TY - CONF A1 - Erning, Johann Wilhelm T1 - Crevice corrosion in pressed stainless steel pipes: A case study N2 - The completion of a failure analysis for leakages on stainless steel pipes is demonstrated. The steps necessary are describd, the reasons for the failure are shown. T2 - MTech 2021 CY - Sibenik, Croatia DA - 6.10.2021 KW - Failure analysis KW - Stainless steel KW - Drinking water KW - Corrosion PY - 2021 AN - OPUS4-53517 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Matamoros-Veloza, A. A1 - Stawski, Tomasz A1 - Vargas, S. A1 - Neville, A. T1 - Study of a Local Structure at the Interface between Corrosion Films and Carbon Steel Surface in Undersaturated CO2 Environments N2 - Industries transporting CO2 gas-saturated fluids have infrastructures made of carbon steel. This is a good material with great mechanical properties but prone to corrosion and potential failure. Corrosion in sweet environments involves the formation of FeCO3 as a corrosion film, which is recognized to play a protective role under certain conditions. This work on the dissolution of corrosion films in sweet environments, under acidic and undersaturated conditions, demonstrates that the effects on the integrity of steel are far more significant than the damage observed on the surface of the corrosion film. Our results prove that dissolution of FeCO3 involved the presence of an amorphous phase, the intermediate formation of FeCl2 or FeCl+, and the presence of a phase with short distance atom–atom correlations. The amorphous phase was identified as a mixture of retained γ-Fe and Fe3C. Partially broken α-Fe and Fe3C structures were identified to prove the damage on the material, confirming the interface zone without evident damage on the corrosion film. Dissolution affected both the α-Fe and FeCO3, with the lattice [102̅] from the FeCO3 crystalline structure being the fastest to dissolve. The damage of steel at the molecular scale was evident at the macroscale with pit depths of up to 250 μm. The impact on the integrity of steel can be, therefore, more drastic than frequently reported in industrial operations of CO2 transport industries that use cleaning procedures (e.g., acid treatment, pigging) as part of their operational activities. KW - Steel KW - Corrosion KW - Siderite KW - Diffraction KW - Pair distribution function KW - Synchrotron PY - 2023 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-572156 DO - https://doi.org/10.1021/acsomega.2c07631 SN - 2470-1343 VL - 8 IS - 9 SP - 8497 EP - 8504 PB - ACS AN - OPUS4-57215 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Völker, Christoph T1 - Visualization of automated multi‐sensor NDT assessment of concrete structures (NDT Data Fusion) N2 - Nondestructive testing(NDT) of concrete buildings allows efficient repair measures. Multi-sensor platforms collect large data sets but the data analysis is typically performed manually. Data Fusion uses the full potential of a multi-sensory data set in order to: - improve information quality (reliability, robustness, accuracy, clarity, completeness) - enable automated algorithm based data analysis. This poster summarizes results of the IGSTC-project entitled "NDT-Data Fusion" (short title) and demonstrates a significant improvement in the testing performance for the example of corrosion detection. T2 - IGSTC-Partners Meeting 2017 CY - Jodhpur, India DA - 22.10.2017 KW - NDT KW - Data Fusion KW - Concrete KW - Corrosion KW - Data analytics PY - 2017 AN - OPUS4-42716 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rütters, H. T1 - Combining CO2 Streams from Different Emitters – A Challenge For Transport And Storage Infrastructure N2 - The European Directive 2009/31/EC on the geological storage of CO2 envisages an open access of CO2 streams from different emitters to a nation- or even EUwide CO2 pipeline network if CO2 stream compositions meet “reasonable minimum composition thresholds”. As of today it is not known how such “composition thresholds” may be defined and which impurity levels may be viable in practical application. To set up recommendations for criteria and respective threshold values for CO2 stream compositions, the project “CLUSTER” will investigate how a dynamic interplay – both in terms of mass fluxes and compositions – of CO2 streams from regionally clustered CO2 sources sharing a transport and storage infrastructure will impact corrosion, e.g., of pipelines and plant components, and geochemical alteration of cap rocks and reservoir rocks. In addition, the behaviour of such a highly dynamic CCS system will be considered for an overall optimization of system design including CO2 stream mixing schemes and facilities or interim CO2 storage. T2 - TCCS-8 – The 8th Trondheim Conference on CO2 Capture, Transport and Storage CY - Trondheim, Norway DA - 16.06.2015 KW - Carbon capture KW - Carbon dioxide KW - Corrosion KW - CCS PY - 2015 AN - OPUS4-47018 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Aristia, Gabriela T1 - Polyaniline/SiO2 Containing Coatings for Geothermal Application N2 - Geothermal brine is considered to be an aggressive environment as it contains various dissolved salts. Even though carbon steel is commonly used as a construction material due to its machinability and economical reason, it is susceptible to uniform and localized corrosion in a high temperature and high pressure system. Therefore, a coating system is introduced to protect the carbon steel against corrosion in such environment. 1. Carbon steel is susceptible to uniform corrosion in presence of oxygen, with corrosion rate of immersion at 150 °C of 0.39 mm/a. 2. Exposure test of carbon steel at 150°C and 10 bar (pressurized by Ar) results in pitting corrosion with depth of 19 µm and width 4 µm on average. 3. OCP measurement shows that the stability of measurement is reached after 40 hours of immersion in the solution. 4. EIS measurement is useful to observe the effect of temperature, immersion time, and coating composition on the corrosion processes of coated metals for use in geothermal application. T2 - FU Forschungsseminar CY - Berlin, Germany DA - 28.11.2017 KW - Geothermal KW - Corrosion KW - Coating PY - 2017 AN - OPUS4-43363 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Potential mapping in theory and practice N2 - Electrochemical potential mapping according to guideline B3 of DGZfP (German Society for Non-Destructive Testing) is a recognized technique for the localization of corroding reinforcing steels. T2 - NDE 2017 Pre Conference CY - Chennai, TN, India DA - 12.12.2017 KW - Corrosion KW - Potential mapping PY - 2017 AN - OPUS4-43471 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Müller, Thoralf T1 - Field exposure studies of austenitic and duplex stainless steels in tunnel atmospheres N2 - Due to the high corrosivity that are present in road tunnel structures, cleaning and maintenance work on stainless steel components in the tunnels is carried out at regular intervals in the tunnels, which means that parts of the lanes or the whole tunnel have to be temporarily closed. To reduce these traffic disruptions and maintenance costs, it is important to reduce the work that is needed for cleaning and maintenance of stainless steel components in road tunnels. One possibility is the identification and utilization of better suited alternatives to the commonly used austenitic stainless steels AISI 316L and AISI 316Ti. Thus, a field exposure study was carried out in different road tunnels throughout Germany to qualify different duplex and lean duplex stainless steels for tunnel constructions. The proposed scientific poster gives an overview of results after the first three years of exposure in three different road tunnels. Samples of different stainless steels were placed in different areas of the tunnel – at lane height and at the ceiling. Some samples were exposed under sheltered conditions. Pit depths were evaluated on the free surface and in crevice areas after each year of exposure. The investigations show that duplex stainless steels have a comparable or even better corrosion resistance than austenitic steels in tunnel atmospheres T2 - Stainless Steel World Conference & Expo 2023 CY - Maastricht, Netherlands DA - 26.09.2023 KW - Corrosion KW - Atmosphere KW - Tunnel KW - Stainless Steel PY - 2023 AN - OPUS4-58487 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Müller, Thoralf T1 - Bericht aus dem ISO-Gremium ISO TC 156 WG4 N2 - Der Vortrag gibt einen Überblick über die Tätigkeiten der Working Group 4 "Atmospheric Corrosion" des ISO Gremiums ISO TC 156 . Es werden neuste Informationen zum Stand verschiedener Normen aus dem Ausschuss wiedergegeben. T2 - GfKorr Gemeinschaftssitzung der AKs "Atmosphärische Korrosion" und "Korrosionsschutz in der Elektronik und Mikrosystemtechnik" CY - Online meeting DA - 05.12.2024 KW - Corrosion KW - Standards KW - Atmospheric Corrosion PY - 2024 AN - OPUS4-62305 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino A1 - Müller, Thoralf A1 - Burkert, Andreas ED - G. Pillai, R. T1 - Stress Corrosion Cracking in Prestressed Concrete Bridge – A Case Study N2 - Bridge structures built using the prestressing block method can exhibit hydrogen-induced stress cracks across the entire cross-section of a prestressing channel due to their design. Crack growth can progress over the service life as a result of dynamic loading and lead to prestressing wire fractures. T2 - Consec 2024 CY - Chennai, India DA - 25.09.2024 KW - Corrosion KW - Spannungsrisskorrosion KW - Stress corrosion cracking KW - Hydrogen KW - Spannstahl PY - 2024 SP - 72 EP - 78 CY - Chennai AN - OPUS4-61330 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Müller, Thoralf T1 - Field exposure studies of austenitic and duplex stainless steels in tunnel atmospheres N2 - Due to the high corrosivity that are present in road tunnel structures, cleaning and maintenance work on stainless steel components in the tunnels is carried out at regular intervals in the tunnels, which means that parts of the lanes or the whole tunnel have to be temporarily closed. To reduce these traffic disruptions and maintenance costs, it is important to reduce the work that is needed for cleaning and maintenance of stainless steel components in road tunnels. One possibility is the identification and utilization of better suited alternatives to the commonly used austenitic stainless steels AISI 316L and AISI 316Ti. Thus, a field exposure study was carried out in different road tunnels throughout Germany to qualify different duplex and lean duplex stainless steels for tunnel constructions. The proposed scientific poster gives an overview of results after the first three years of exposure in three different road tunnels. Samples of different stainless steels were placed in different areas of the tunnel – at lane height and at the ceiling. Some samples were exposed under sheltered conditions. Pit depths were evaluated on the free surface and in crevice areas after each year of exposure. The investigations show that duplex stainless steels have a comparable or even better corrosion resistance than austenitic steels in tunnel atmospheres. T2 - EUROCORR 2022 CY - Berlin, Germany DA - 28.08.2022 KW - Corrosion KW - Atmosphere KW - Tunnel KW - Stainless Steel PY - 2022 AN - OPUS4-55595 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Seifert, Lando T1 - A New Young Network - die junge gfkorr (Das Netzwerk für junge Korrosionisten) N2 - This invited talk at the Young EFC Meeting (European Federation of Corrosion) was about the new network, founded in Germany in 2023, specialising in corrosion and corrosion protection. The network is called "die junge gfkorr" and has the following aims: (i) Initiation of in-person events with excursions and a networking atmosphere. (ii) Members come from both industry and academia can find similarities in each other's work (iii) Get to know each other and learn from each other, and (iv) Members benefit long-term by using the network throughout their careers and for future collaboration on daily business and research projects. T2 - Conference EUROCORR 2025, Young EFC Meeting CY - Stavanger, Norway DA - 07.09.2025 KW - Coatings KW - Corrosion KW - Corrosion Protection KW - Network PY - 2025 AN - OPUS4-64102 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mensinger, M. A1 - Fischer, O. A1 - Oberhaidinger, F. A1 - Stimmelmayer, L. A1 - Ebell, Gino A1 - Babutzka, Martin T1 - Grouted joint for integral composite frame bridges suitable for hot dip galvanizing N2 - Due to the corrosion resistance of carbon steel, bridge constructions are currently protected against corrosion by applied coating systems. These coating systems need to be renewed after approximately 25 50 years. Galvanized constructions without any welding areas at the construction site could be prepared as grouted joints and can be used without any renewing for about 100 years. T2 - Intergalva 2022 CY - Rome, Italy DA - 20.06.2022 KW - Corrosion KW - Galvanized steel KW - Bridge PY - 2022 AN - OPUS4-55096 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Auslagerungsstand 41 Berlin N2 - Im Rahmen des UNESCO geförderten Materials Rise Projektes hat die BAM einen neuen Standort im Auftrag des Umweltbundesamtes erstellt. Hier werden Umweltdaten und Korrosionsparameer für verschiedene Werkstoffe ermittelt. Darüber hinaus werden BAM-eigene Proben zur Bestimmung der Korrosivität des Standortes ausgelagert. T2 - UBA-Rise Meeting 2024 CY - Online meeting DA - 16.10.2024 KW - Corrosion KW - Korrosion PY - 2024 AN - OPUS4-61370 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Prestressed Concrete Structures with ConcentratedTendons- Structural Damage due to Hydrogen-Induced Stress Corrosin Cracking N2 - In the course of the deconstruction of the "Bridge of the 20th anniversary of the GDR" at the Altstädter Bahnhof in Brandenburg a. d. Havel, new information on the initiation of hydrogen-induced stress cracks was obtained. BAM was commissioned by the Brandenburg State Road Administration to participate in a corresponding joint project which is financed by the Federal Ministry for Digital and Transport. The added value of the new information gained in this project goes beyond the specific structure. It describes unexpected new damage patterns that can be transferred to other structures with concentrated tendons (tendon block method and Baur-Leonhardt method) and were previously unknown in this form. These should be made known to other developers to enable them to initiate any necessary actions. T2 - Consec 2024 CY - Chennai, India DA - 24.09.2024 KW - Corrosion KW - Spannstahl KW - Hydrogen KW - Korrosion PY - 2024 AN - OPUS4-61305 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Galvanic Anode systems in Concrete structures and their performance part 1 N2 - Corrosion of reinforcement is one of the major reasons in questioning the sturdiness of building structures. The application of cathodic protection techniques plays a big role in controlling the corrosion process to ensure a longer service life of building structures. This systematic study compares the efficiency and durability of various discrete galvanic zinc anode systems available in the current market using different criteria for measuring efficiencies such as potential measurements, electrolyte resistance measurements and several polarization methods to determine the polarizability of the anodes. Results to validate the performance of long-time exposure of discrete zinc anodes in the concrete medium are already shown in 2021. Now the results of analyzing the phase boundary between mortar and anodes by using 3D computer tomography are shown, as also the field application at large-scale specimens where the potential distribution and the current were investigated. T2 - Eurocorr 2023 CY - Brussels, Belgium DA - 27.08.2023 KW - Corrosion KW - Corrosion Protection PY - 2023 AN - OPUS4-58169 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Potential Mapping at Concrete Structures N2 - Electrochemical potential mapping is a recognized technique for the localization of corroding reinforcing steels. Areas of corroding reinforcement steel can be located in a non-destructive manner by means of this procedure. Half‐cell potential measurements are used in order to detect chloride‐induced corrosion. However, it is not recommended in order to assess the risk of carbonation‐induced corrosion. For this purpose, determining the carbonation depth and the concrete cover appears more appropriate. The content of this specification exclusively refers to the application of mobile, local variable reference electrodes, which are only placed on the concrete surface while measuring. The technique distinguishes itself thereby from the range of corrosion monitoring systems with stationary installed reference electrodes and sensor systems, respectively, whereby it is possible to continuously track measurements within the area of the installed electrodes. However, these methods are not dealt with in this specification. T2 - NDT&E Workshop 2024 CY - Baruth/Mark, Germany DA - 03.07.2024 KW - Corrosion KW - Potential mapping PY - 2024 AN - OPUS4-60584 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Seyhan, E. A1 - Ebell, Gino A1 - Jimenez, D. A1 - Chavez, J. A1 - Sanchez Alvarez, G T1 - Evaluation of SACI performance on reinforced concrete structures N2 - Surface applied corrosion inhibitors (SACI) are widely used to mitigate corrosion process of steel reinforcement in concrete. But they remain controversial as to their effectiveness and the ability to compare materials from different manufacturers and technologies. They are applied onto the surface of hardened concrete and penetrate towards steel reinforcement. This paper discusses the corrosion inhibition performances of dual-phase surface applied corrosion inhibitor and the efficiency of the corrosion inhibitor is assessed by selected testing procedures in BAM laboratories. T2 - ACHE 2022 CY - Santander, Spain DA - 20.06.2022 KW - Corrosion KW - Inhibitor PY - 2022 AN - OPUS4-55095 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ebell, Gino A1 - Mayer, T. F. A1 - Harnisch, J. A1 - Dauberschmidt, Ch. T1 - Corrosion monitoring of reinforced concrete structures:The DGZfP specification B12 Collaboration N2 - Corrosion monitoring of reinforced or prestressed concrete structures has becomeincreasingly important in recent years. Areas of application include componentsthat are no longer accessible after completion or where potential fieldmeasurements cannot be carried out due to existing coatings. Corrosion monitoringcan also be used to monitor the progress of corrosion in corroding systems, e.g. to prove the success of repair measures according to repair principle 8 in accordancewith EN 1504‐9 or repair method 8.3 in accordance with the DIBt repair guideline.It also could be used to prove the functionality of cathodic corrosion protectionsystems in accordance with ISO 12696. Despite the increasing importance ofcorrosion monitoring, no guidelines orrecommendations existed until 2018. Thisgap was closed by the English version of specification B12,“Corrosion Monitoringof Reinforced and Prestressed Concrete Structures,”of the German Society for Non‐Destructive Testing, which was published in 2021. This article introducesspecification B12 by explaining the basicmeasurement principles and illustratingthe potential of corrosion monitoring in new and existing buildings. KW - Corrosion KW - Monitoring PY - 2023 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-580982 DO - https://doi.org/10.1002/maco.202313934 SN - 0947-5117 SP - 1 EP - 9 PB - Wiley VHC-Verlag AN - OPUS4-58098 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Atmospheric Corrosion - Sheltered Ventilated Conditions - An Opportunity for a Standardized Exposure site Rack N2 - To determine the corrosivity of atmospheric conditions, standardized metal sheets are exposed. After pickling, the loss of mass indicates the corrosivity of the atmospheric conditions. Under marine conditions, a sheltered opportunity will mirror the situation where e.g. chlorides could accumulate on the surface because they are protected from rain. Under these conditions, the corrosivity could be even higher than under free weather conditions. These sheltered conditions are necessary for a realistic service life prediction. T2 - Eurocorr 2024 CY - Paris, France DA - 01.09.2024 KW - Corrosion KW - Atmospheric corrosion KW - Korrosion PY - 2024 AN - OPUS4-60967 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Detektion korrosionsaktiver Bereiche an Brückenbauwerken aus Stahlbeton mittels Potentialfeldmessung N2 - Durch das alkalische Porenwassermilieu wird Stahl im Beton durch Ausbildung einer Deckschicht vor Korrosion geschützt. Unter ungünstigen Umgebungsbedingungen (Karbonatisierung, Chlorideintrag) kann die passive Deckschicht auf der Stahloberfläche zerstört werden. Im weiteren Verlauf können sich durch Volumenexpansion der Korrosionsprodukte korrosionsbedingte Folgeschäden, wie Risse und Abplatzungen am Bauwerk ergeben. Um notwendige Sanierungsmaß-nahmen sind frühzeitige und weitgehend zerstörungsfrei ermittelte Informationen über das aktuelle Korrosionsverhalten der Stahlbewehrung von großer Bedeutung. Die Potentialfeldmessung ist ein etabliertes und weit verbreitetes Verfahren zur Beurteilung des Korrosionszustandes der Bewehrung in Stahlbetonbauwerken. Mit Hilfe dieses Verfahrens können Bereiche aktiv korrodierender Bewehrung zerstörungsfrei lokalisiert werden. In der Regel kommt diese Messmethode bei der Detektion chloridinduzierter Korrosion zum Einsatz. T2 - 4. Brückenkolloquium CY - Online meeting DA - 08.09.2020 KW - Korrosion KW - Potentialfeldmessung KW - Corrosion PY - 2020 AN - OPUS4-51219 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Maack, Stefan A1 - Torrent, R. A1 - Ebell, Gino A1 - Völker, Tobias A1 - Küttenbaum, Stefan T1 - Testing to reassess – Corrosion activity assessment based on NDT using a prestressed concrete bridge as case-study N2 - Corrosion of concrete reinforcement is one of the major damage mechanisms affecting both the load-bearing capacity and the serviceability of re-inforced concrete structures significantly. When externally discernible damages are observed during visual inspections on the structure, the extent of the damage inside the concrete is often already significant. Corrosion caused by carbonation often leads to severe discoloration of the surface or even large-area spalling of the concrete cover. In contrast, chloride-induced corrosion is usually difficult to observe visually but can cause much more serious damage in less time. The effect occurs locally and can lead to weakening of the cross-section of the reinforce-ment. This, in turn, can cause sudden structural collapses without prior notice. In the meanwhile, various non-destructive and minimally invasive testing methods are available to evaluate the resistance to penetration of corrosion-pro-moting pollutants and to detect active corrosion. In this paper, a bridge crossing the river Regen is used as a case-study to demonstrate how the information ob-tained applying different testing methods can be combined and evaluated in the context of structural reassessments. Both the results of the permeability testing and the electrical resistance measurement are considered, as well as active corro-sion areas are localized using the half-cell potential mapping combined with the concrete cover measurement with the eddy current method and ground penetrat-ing radar. The results are evaluated using drill cores and in addition laser-induced breakdown spectroscopy was applied to obtain information about possible chlo-ride ion transport into the concrete. T2 - EUROSTRUCT 2021 – 1ST conference of the european association on quality control of bridges and structures - Eurostruct CY - Padova, Italy DA - 30.08.2021 KW - Nondestructive testing KW - Corrosion KW - Bridge KW - Durability assessment KW - Civil engineering PY - 2022 SN - 978-3-030-91876-7 SP - 1 EP - 9 PB - Springer International Publishing AN - OPUS4-54006 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Innovative Prüfverfahren für die Korrosionsprüfung von Beton- und Spannstähle N2 - Neue Materialien bedürfen je nach Fragestellung angepasste Prüfverfahren um die Anwendung dieser in der Praxis in Gänze sicherstellen zu können. Hierzu hat die BAM ein neues Prüfverfahren entwickelt und bestehende Prüfverfahren für neue Fragestellungen zu bestehenden Materialien angepasst. T2 - 63. Forschungskolloquium der BAM und des dafstb CY - Berlin, Germany DA - 16.10.2024 KW - Corrosion KW - Korrosion KW - Spannungsrisskorrosion KW - Wasserstoff PY - 2024 AN - OPUS4-61371 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino A1 - Burkert, Andreas T1 - Prestressed concrete structures with concentrated tendons - Structural damage due to hydrogen-induced stress corrosion cracking N2 - Hydrogen-induced stress corrosion cracking (HSCC) is well known, and highly sensitive pre-stressing steels are normally not available on the market. But in the case of existing structures, it could be necessary to ensure their safety through special kinds of investigations. Those kinds of investigations are often not applicable in a non-destructive way. Therefore, a once in a lifetime project was initiated. In the course of the deconstruction of the "Bridge of the 20th anniversary of the GDR" at the Altstädter Bahnhof in Brandenburg a. d. Havel, new information on the initiation of hydrogen-induced stress cracks could obtained. The initial observation to do several investigations at this bridge are several meters long longitudinal cracks in the concrete web of the box girder above and below the tension duct. The BAM was commissioned by the Brandenburg State Road Administration to participate in a corresponding joint project which is financed by the Federal Ministry for Digital and Transport. The added value of the new information gained in this project goes beyond the specific structure. It describes unexpected new damage patterns that can be transferred to other structures with concentrated tendons (tendon block method and Baur-Leonhardt method) and were previously unknown in this form. These should be made known to other developers to enable them to initiate any necessary actions. One of the major results is, the wire breaks observed at this bridge can be attributed to cracking as a result of HSCC and subsequent crack growth until breakage, due to cyclic loading from traffic and alternating restraint stresses. The probable trigger here was crevice corrosion processes at the contact points of the wires to the spacer plates in superposition with high tensile stresses due to prestressing after or with in grouting the duct. Tension wire breaks, which may have occurred before grouting and during prestressing, were not detected. The unfavorable gap situation at the spacer plates occurs over the entire cross-section of the prestressing channel and can thus affect each individual prestressing wire. Losses in the load-bearing capacity of the prestressed concrete structure can then be the result. A disadvantage of the prestressing block method in this respect is that a large number of individual wires can be affected at the same time (theoretically all wires), which can reduce the prestressing effect of the concentrated tendon accordingly. With the usual use of only one tendon per web, the possibility of load transfer to other tendons is thus not given (lack of redundancy). T2 - 4rd International Congress on Materials & Structural Stability CY - Rabat, Morocco DA - 08.03.2023 KW - Corrosion KW - HSCC KW - Wasserstoff KW - Spannungsrisskorrosion PY - 2023 AN - OPUS4-57158 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Potentialfeldmessung in Theorie und Praxis N2 - Durch das alkalische Porenwassermilieu ist Stahl im Beton vor Korrosion geschützt. Unter ungünstigen Umgebungsbedingungen (Karbonatisierung, Chlorideintrag) kann die passive Deckschicht auf der Stahloberfläche zerstört werden. Im weiteren Verlauf können sich korrosionsbedingte Folgeschäden, wie Risse und Abplatzungen am Bauwerk ergeben. Um notwendige Sanierungsmaßnahmen sind frühzeitige und weitgehend zerstörungsfrei ermittelte Informationen über das aktuelle Korrosionsverhalten der Stahlbewehrung von großer Bedeutung. Die Potentialfeldmessung ist ein etabliertes und weit verbreitetes Verfahren zur Beurteilung des Korrosionszustandes der Bewehrung in Stahlbetonbauwerken. Mit Hilfe dieses Verfahrens können Bereiche aktiv korrodierender Bewehrung zerstörungsfrei lokalisiert werden. In der Regel kommt diese Messmethode bei der Detektion chloridinduzierter Korrosion zum Einsatz. T2 - Vorlesung TU Berlin CY - Online meeting DA - 10.06.2020 KW - Korrosion KW - Corrosion KW - Potentialfeldmessung PY - 2020 AN - OPUS4-50905 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schwarz, W. A1 - Wilsch, Gerd A1 - Katsumi, N. A1 - Ebell, Gino A1 - Völker, Tobias T1 - Ion distribution in concrete overlay, mapped by laser induced breakdown spectroscopy (LIBS), modified by an embedded zinc anode N2 - Galvanic corrosion protection by embedded zinc anodes is an accepted technique for the corrosion protection of reinforcing steel in concrete. Galvanic currents flow between the zinc anode and the steel reinforcement due to the potential difference that is in the range of a few hundred mV. The ion distribution was studied on two steel reinforced concrete specimens admixed with 3 wt.% chloride/wt. cement and galvanically protected by a surface applied EZ-anode. On both specimens, a zinc anode was embedded and glued to the concrete surface by a geo-polymer-based chloride-free binder. At one specimen, the EZ-anode was operated for 2,5 years, the EZ-anode at the other specimen was not electrically connected to the reinforcement, this specimen serves as a reference. Both specimens have been stored under identical conditions. The ion distribution between the anode (EZ-anode) and cathode (steel reinforcement) was studied by laser-induced breakdown spectroscopy (LIBS) after 7 months, 12 months, and 2,5 years. Results of the LIBS studies on the specimen with activated EZ-anode after 7 months, 12 months, and 2,5 years and of the reference specimen after 2,5 years are reported. Results show that diffusion of ions contributes to the changes in the ion distribution but migration, especially of chlorides towards the EZ-anode is significant despite the weak electric field – several hundred millivolts - generated by the galvanic current. Results show that chloride ions accumulate near the zinc-anode as in water-insoluble zinc-hydroxy chlorides - Simonkolleit. T2 - ICCRRR 2022 CY - Capetown, South Africa DA - 03.10.2022 KW - Korrosion KW - Corrosion KW - LIBS KW - Zinc PY - 2022 AN - OPUS4-55948 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Prestressed Concrete Structures with Concentrated Tendons - Structural Damage due to Hydrogen-Induced Stress Corrosion Cracking N2 - In the course of the deconstruction of the "Bridge of the 20th anniversary of the GDR" at the Altstädter Bahnhof in Brandenburg a. d. Havel, new information on the initiation of hydrogen-induced stress cracks was obtained. BAM was commissioned by the Brandenburg State Road Administration to participate in a corresponding joint project which is financed by the Federal Ministry for Digital and Transport. The added value of the new information gained in this project goes beyond the specific structure. It describes unexpected new damage patterns that can be transferred to other structures with concentrated tendons (tendon block method and Baur-Leonhardt method) and were previously unknown in this form. These should be made known to other developers to enable them to initiate any necessary actions. T2 - Eurocorr 2022 CY - Berlin, Gemany DA - 29.08.2022 KW - Korrosion KW - Corrosion KW - Hydrogen KW - Stress Cracking PY - 2022 AN - OPUS4-55613 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Potential Mapping - What could we measure and what should we able to detect – guideline B03 of DGZfP N2 - “Electrochemical potential mapping according to guideline B3 of DGZfP (German Society for Non-Destructive Testing) is a recognized technique for the localization of corroding reinforcing steels. Areas of corroding reinforcement steel can be located in a non-destructive manner by means of this procedure. Half‐cell potential measurements are used in order to detect chloride‐induced corrosion. However, it is not recommended in order to assess the risk of carbonation‐induced corrosion. For this purpose, determining the carbonation depth and the concrete cover appears more appropriate. The content of this specification exclusively refers to the application of mobile, local variable reference electrodes, which are only placed on the concrete surface while measuring. The technique distinguishes itself thereby from the range of corrosion monitoring systems with stationary installed reference electrodes and sensor systems, respectively, whereby it is possible to continuously track measurements within the area of the installed electrodes. However, these methods are not dealt with in this specification.” T2 - NDT-CE 2022 CY - Zurich, Switzerland DA - 16.08.2022 KW - Korrosion KW - Potentialfeldmessung KW - Corrosion KW - Half-cell potential KW - Potential mapping PY - 2022 AN - OPUS4-55524 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino A1 - Lehmann, Jens A1 - Burkert, Andreas T1 - Weathring camopaigns to determine corrosivity on offshore wind turbines N2 - ISO 9223 standard for the classification of corrosivity in atmospheres is based on the mass loss of standard samples. We are concerned with the question of which corrosivity categories for Fe-sheets can be found at an offshore wind turbine and where they are comparable with our offshore locations. The preliminary results indicate that the extreme corrosivity of class CX is only given in splash water-affected exposure, which is not a real atmospheric exposure condition. The results of the exposure at the SP show that the corrosivity category changes into C4, only a few meters above the splash water zone. Compared to the marine environments at Helgoland or OSS-Platform, the corrosivity is higher. The offshore environment is not as corrosive as originally expected, no atmospheric corrosion attack could be determined that would form the corrosivity category C5. T2 - Eurocorr 2024 CY - Paris, France DA - 01.09.2024 KW - Korrosion KW - Corrosion PY - 2024 AN - OPUS4-60973 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Maack, Stefan T1 - Testing to reasses - Corrosion activity assessment based on NDT using a prestressed concrete bridge as case study N2 - Corrosion of concrete reinforcement is one of the major damage mechanisms affecting both the load-bearing capacity and the serviceability of reinforced concrete structures significantly. The challenge of detecting corrosion is that the corrosion process in its various forms is not immediately visible, especially in the corrosion initiation phase inside the concrete. When externally discernible damages are observed during visual inspections on the structure, the extent of the damage inside the concrete is often already significant. Corrosion caused by carbonation often leads to severe discoloration of the surface or even large-area spalling of the concrete cover. In contrast, chloride-induced corrosion is usually difficult to observe visually, but can cause much more serious damage in less time. The effect occurs locally and can lead to weakening of the cross-section of the reinforcement. This, in turn, can cause sudden structural collapses without prior notice. Therefore, it is important to investigate whether there is protection against corrosion of the reinforcement in the concrete and to detect active corrosion in the structure at an early stage. In the meanwhile, various non-destructive and minimally invasive testing methods are available to evaluate the resistance to penetration of corrosion-promoting pollutants and to detect active corrosion. In this paper, a bridge crossing the river Regen (Germany) is used as a case-study to demonstrate how the information obtained applying different testing methods can be combined and evaluated in the context of structural reassessments. Both the results of the permeability testing (Torrent tester) and the electrical resistance measurement (Wenner probe) are considered, as well as active corrosion areas are localized using the half-cell potential mapping combined with the concrete cover measurement with the eddy current method and ground penetrating radar (GPR). The results are evaluated using drill cores and in addition laser-induced breakdown spectroscopy (LIBS) was applied to obtain information about possible ion transport in the concrete. T2 - EUROSTRUCT 2021 - 1st Conference of the European Association on Quality Control of Bridges and Structures - EUROSTRUCT CY - Padova, Italy DA - 30.08.2021 KW - Nondestructive testing KW - Corrosion KW - Bridge KW - Durability assessment KW - Civil engineering PY - 2021 AN - OPUS4-53222 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Befestigungsmittels im Bauwesen - Der richtige Werkstoff??? N2 - Die Anforderungen in verschiedenen Fachgebieten des Bauwesens an metallene Befestigungsmittels hinsichtlich des Korrosionsschutzes sind zum einen Abhängig von den verwendeten Werkstoffen und zum anderen von der Korrosivität in der jeweiligen Exposition. Hier wird ein Überblick über die gängigen Werkstoffe als auch Anwendung und Fehlerquellen verschaff T2 - TU-Berlin Vorleseung CY - Berlin, Germany DA - 05.06.2024 KW - Korrosion KW - Corrosion PY - 2024 AN - OPUS4-60974 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino A1 - Achenbach, R. A1 - Harnisch, J. T1 - The dgzfp Subcommittee „Corrosion Detection in Reinforced Concrete“ N2 - The subcommittee “Corrosion Detection in Reinforced Concrete” is a technical committee within the scope of the German Society for Non-Destructive Testing (DGZfP). The international working group consists of engineers and scientists from Germany, Austria and Switzerland who work at research institutes or engineering firms and aims for the practical implementation of non-destructive testing in civil engineering (NDT-CE) methods to assess the corrosion condition of reinforced concrete (RC) structures. Therefore, the group works on technical specifications that explain the necessary theoretical background of the presented techniques but mainly provide helpful instructions for the application on-site and in the laboratory. Based on the corrosion process of steel in concrete the specifications focus on selected topics where the field engineer is getting into contact with the phenomenon. Therefore, specification B 12 highlights corrosion monitoring in reinforced and prestressed concrete structures and presents different approaches to monitor the initiation and propagation phase of corrosion and shows case studies of where these techniques were applied successfully. Specification B 03 deals with the potential-mapping technique. In addition to this specification, practical training courses and certification in this method have been developed and are offered by the working group members and are organized by the DGZfP. Both specifications, B 03 as well as B 12, are available in English. In the case of specification B 03, the current version is still in the translation process and will be available soon. Currently, the group is working on a new specification for measuring the electrical resistivity of cementitious materials, for example, to evaluate the suitability of mortars for cathodic protection applications and to validate the influence of the concrete resistivity with regard to corrosion processes of steel in concrete. Given the increasing impact of corrosion damages on infrastructural structures, the working group would like to introduce the use of the mentioned specifications to an interested international audience and thus offer the possibility to reliably detect corrosion damages at an early stage to prevent significant damages or high repair costs on RC structures. T2 - ICCRRR 2024 CY - Cape Town, South Africa DA - 03.11.2024 KW - Corrosion KW - Monitoring PY - 2024 AN - OPUS4-61603 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ebell, Gino A1 - Burkert, Andreas A1 - Mietz, Jürgen T1 - Detection of reinforcement corrosion in reinforced concrete structures by potential mapping: Theory and practice N2 - Electrochemical potential mapping according to guideline B3 of DGZfP (German Society for Nondestructive Testing) is a recognized technique for the localization of corroding reinforcing steels. In reinforced concrete structures the measured potentials are not necessarily directly linked to the corrosion likelihood of the reinforcing steel. The measured values may be significantly affected, different from, e.g., stress measurement, by different influences on the potential formation at the phase boundary metal/concrete itself as well as the acquisition procedure. Due to the complexity of influencing factors there is a risk that the results are misinterpreted. Therefore, in a training concept firstly the theoretical basics of the test method should be imparted. Then, frequently occurring practical situations of various influencing factors will be made accessible to the participants by a model object specially designed for this purpose. The aim is to impart profound knowledge concerning the characteristics of potential mapping for detecting corrosion of reinforcing steel in order to apply this technique in practice as reliable and economical test method. KW - Corrosion KW - Potential mapping KW - Korrosion KW - Potentialfeldmessung PY - 2018 DO - https://doi.org/10.1155/2018/3027825 SN - 1687-9333 SN - 1687-9325 VL - 2018 SP - Article 3027825, 1 EP - 6 PB - Hindawi AN - OPUS4-46206 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Seifert, Lando T1 - The Development of a new Test Method for assessing the Susceptibility of Prestressing Steels to HiSCC N2 - This EUROCORR 2021 talk gives current results of the WIPANO research project "safety of prestressing steels." The project targets improving DIN EN ISO 15630-3 according to the reproducibility and scattering of constant load tests to assess the susceptibility of prestressing steels to stress corrosion cracking. Essential questions which we answered in the talk was: Are test practical on surfaces in delivery condition? What are the hydrogen activities of test solutions A and B during free corrosion and cathodic polarization? Can the test be improved by a modification of the test cell dimensions? T2 - Virtual EUROCORR 2021 CY - Online meeting DA - 20.09.2021 KW - Prestressing steels KW - Corrosion KW - Test electrolytes KW - DIN EN ISO 15630-3 KW - Stress corrosion cracking KW - Hydrogen charging KW - Permeation measurements PY - 2021 AN - OPUS4-53325 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Corrosivity of Atmospheres and the Resulting Corrosion Protection of Galvanized Steel N2 - The investigation of the corrosivity of atmospheres are major target to ensure the durability of metallic structures. Therefore the corrosivity has to be determined and finally, the right material or corrosion protection system has to be chosen. T2 - Intergavla CY - Brussels, Belgium DA - 10.06.2024 KW - Corrosion KW - Potentialfeldmessung KW - Atmospheric corrosion PY - 2024 AN - OPUS4-60591 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino A1 - Poltavtseva, M. A1 - Mietz, Jürgen ED - Ottosen, L. T1 - Electrochemical investigation of carbon-based conductive coatings for application as anodes in ICCP system of reinforced concrete structures N2 - Carbon-based conductive coatings are complex composites, consisting of an organic or inorganic binder and conductive carbon components, for application as anodes in impressed current cathodic protection systems of reinforced concrete structures. The electrochemical properties of three coatings at different humidity and in saturated calcium hydroxide solution were studied by electrochemical methods, such as electrochemical impedance measurement, measuring of open circuit potential over time and galvanostatic polarization. T2 - International RILEM Conference on Materials, Systems and Structures in Civil Engineering 2016 CY - Lyngby, Denmark DA - 21.08.2016 KW - ICCP KW - Coating KW - Cunductive KW - Corrosion KW - reinforcement KW - Concrete KW - Cathodic protection PY - 2016 SN - 978-2-35158-176-6 SN - 978-2-35158-177-3 VL - Proceedings PRO 111 SP - 43 EP - 46 PB - RILEM Publications S.A.R.L. CY - Paris, France AN - OPUS4-37216 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Electrochemical investigation of carbon-based conductive coatings for application as anodes in ICCP system of reinforced concrete structures N2 - Carbon-based conductive coatings are complex composites, consisting of an organic or inorganic binder and conductive carbon components, for application as anodes in impressed current cathodic protection systems of reinforced concrete structures. The electrochemical properties of three coatings at different humidity and in saturated calcium hydroxide solution were studied by electrochemical methods, such as electrochemical impedance measurement, measuring of open circuit potential over time and galvanostatic polarization. T2 - MSSCE Materials, Systems and Structures in Civil Engineering 2016 CY - Lyngby, Denmark DA - 21.08.2016 KW - ICCP KW - Cathodic protection KW - Corrosion KW - Concrete KW - Reinforcement PY - 2016 AN - OPUS4-37215 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Corrosion of galvanized reinforcement in carbonated concrete N2 - Corrosion of galvanized steel in carbonated concrete is different from the corrosion of reinforcement made of carbon steel. This is based on the corrosion mechanism of galvanized steel in dependence of the pH-value of carbonated concrete. To describe the influence of a lower pHvalue on the corrosion activity of galvanized reinforcement, different electrochemical measurements were made. The anodic and cathodic partial reaction were investigated by galvanostatic pulse measurements and potentiodynamic measurements. Especially the galvanostatic pulse measurements can describe the influence of the lower pH-value by the anodic polarization resistance with pt = 20 sec. (polarization time). Additionally, corrosion current measurements were performed, coupled with potential measurements, between galvanized steel in carbonated and non-carbonated concrete. Normally, the potential measurements are an indicator to localize the anodic and cathodic parts of a macro system. In this case the cathode was more negative than the anode before they were coupled. After the coupling of the two specimens the mixed potential was much more positive than the single potential of the galvanized steel in carbonated concrete. It increased up to the potential range of the non-carbonated specimens. This means that in case of carbonated outer areas, the embedded galvanized steel forms the cathodic part of a macro element. T2 - Eurocorr 2016 CY - Montpellier, France DA - 11.09.2016 KW - Galvanized KW - Rebar KW - Concrete KW - Corrosion PY - 2016 AN - OPUS4-37432 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Electrochemical Investigations on the Corrosion Behaviour of Galvanized Reinforcing Steels in Chloride Containing Mortar N2 - Corrosion of galvanized steel in chloride containing mortar is different from the corrosion of reinforcement made of carbon steel. This is based on the corrosion behavior of galvanized steel in chloride containing mortar. To describe the influence of a chloride containing zinc-hydroxide layer at the phase boundary against a zinc-hydroxide layer in chloride free mortar, different electrochemical measurements were made. The anodic and cathodic partial reaction were investigated by galvanostatic pulse measurements and potentiodynamic measurements. Especially the galvanostatic pulse measurements can describe the influence of the chloride content by the polarization resistance with pt = 20 sec. (polarization time). Additionally, corrosion current measurements were performed, coupled with potential measurements, between galvanized steel in chloride containing and chloride free concrete. Normally, the potential measurements are an indicator to localize the anodic and cathodic parts of a macro system. In this case the results show that there is no formation of a significant macro element cell between chloride containing and chloride free mortar. After 1500 h of potential and current measurement the results show a more positive corrosion potential with increasing chloride content. The results of the potential/current curves show a significant different free corrosion current depending on the chloride content, the free corrosion current increase with increasing chloride contents; reasons for this behavior are discussed. T2 - Eurocorr 2017 CY - Prague, Czech Republic DA - 03.09.2017 KW - Corrosion KW - Galvanized KW - Reinforcement PY - 2017 AN - OPUS4-41856 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Large scale reinforced concrete test specimen for potential mapping under practical conditions N2 - Electrochemical potential mapping according to guideline B3 of DGZfP (German Society for Non-Destructive Testing) is a recognized technique for the localization of corroding reinforcing steels. In reinforced concrete structures the measured potentials are not necessarily directly linked to the corrosion likelihood of the reinforcing steel. The measured values may be significantly affected, different from e.g. stress measurement, by different influences on the potential formation at the phase boundary metal/concrete itself as well as the acquisition procedure. Due to the complexity of influencing factors there is a risk that the results are misinterpreted. To investigate these influencing factors under practical conditions it requires a specimen with similar damage patterns, dimensions and more factors e.g. metallic mounting parts. Recently the BAM realized such a large scale test specimen for this purpose. T2 - NDE 2017 CY - Chennai, TN, India DA - 14.12.2017 KW - Potential mapping KW - Corrosion KW - Reinforcement PY - 2017 AN - OPUS4-43472 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Potentialmessung im Stahlbetonbau N2 - Durch das alkalische Porenwassermilieu ist Stahl im Beton vor Korrosion geschützt. Unter ungünstigen Umgebungsbedingungen (Karbonatisierung, Chlorideintrag) kann die passive Deckschicht auf der Stahloberfläche zerstört werden. Im weiteren Verlauf können sich korrosionsbedingte Folgeschäden, wie Risse und Abplatzungen am Bauwerk ergeben. Um notwendige Sanierungsmaßnahmen sind frühzeitige und weitgehend zerstörungsfrei ermittelte Informationen über das aktuelle Korrosionsverhalten der Stahlbewehrung von großer Bedeutung. Die Potentialfeldmessung ist ein etabliertes und weit verbreitetes Verfahren zur Beurteilung des Korrosionszustandes der Bewehrung in Stahlbetonbauwerken. Mit Hilfe dieses Verfahrens können Bereiche aktiv korrodierender Bewehrung zerstörungsfrei lokalisiert werden. In der Regel kommt diese Messmethode bei der Detektion chloridinduzierter Korrosion zum Einsatz T2 - KKS-Schulung CY - TAE Esslingen, Germany DA - 23.04.2018 KW - Korrosion KW - Potentialfeldmessung KW - Corrosion PY - 2018 AN - OPUS4-44770 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Potentialfeldmessung in Theorie und Praxis N2 - Durch das alkalische Porenwassermilieu wird Stahl im Beton durch Ausbildung einer Deck-schicht vor Korrosion geschützt. Unter ungünstigen Umgebungsbedingungen (Karbonatisie-rung, Chlorideintrag) kann die passive Deckschicht auf der Stahloberfläche zerstört werden. Im weiteren Verlauf können sich durch Volumenexpansion der Korrosionsprodukte korrosi-onsbedingte Folgeschäden, wie Risse und Abplatzungen am Bauwerk ergeben. Um notwen-dige Sanierungsmaßnahmen sind frühzeitige und weitgehend zerstörungsfrei ermittelte In-formationen über das aktuelle Korrosionsverhalten der Stahlbewehrung von großer Bedeu-tung. Die Potentialfeldmessung ist ein etabliertes und weit verbreitetes Verfahren zur Beur-teilung des Korrosionszustandes der Bewehrung in Stahlbetonbauwerken. Mit Hilfe dieses Verfahrens können Bereiche aktiv korrodierender Bewehrung zerstörungsfrei lokalisiert werden. In der Regel kommt diese Messmethode bei der Detektion chloridinduzierter Korro-sion zum Einsatz. T2 - 3-Länder-Korrosionstagung CY - Zürich, Switzerland DA - 12.04.2018 KW - Korrosion KW - Corrosion KW - Potentialfeldmessung PY - 2018 AN - OPUS4-44698 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Potentialmessung in Theorie und Praxis N2 - Durch das alkalische Porenwassermilieu ist Stahl im Beton vor Korrosion geschützt. Unter ungünstigen Umgebungsbedingungen (Karbonatisierung, Chlorideintrag) kann die passive Deckschicht auf der Stahloberfläche zerstört werden. Im weiteren Verlauf können sich korrosionsbedingte Folgeschäden, wie Risse und Abplatzungen am Bauwerk ergeben. Um notwendige Sanierungsmaßnahmen sind frühzeitige und weitgehend zerstörungsfrei ermittelte Informationen über das aktuelle Korrosionsverhalten der Stahlbewehrung von großer Bedeutung. Die Potentialfeldmessung ist ein etabliertes und weit verbreitetes Verfahren zur Beurteilung des Korrosionszustandes der Bewehrung in Stahlbetonbauwerken. Mit Hilfe dieses Verfahrens können Bereiche aktiv korrodierender Bewehrung zerstörungsfrei lokalisiert werden. In der Regel kommt diese Messmethode bei der Detektion chloridinduzierter Korrosion zum Einsatz. T2 - Vorlesung TU-Berlin CY - TU-Berlin, Germany DA - 30.05.2018 KW - Korrosion KW - Potentialfeldmessung KW - Corrosion PY - 2018 AN - OPUS4-45047 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Ebell, Gino T1 - Potentialfeldmessung in Theorie und Praxis N2 - Durch das alkalische Porenwassermilieu ist Stahl im Beton vor Korrosion geschützt. Unter ungünstigen Umgebungsbedingungen (Karbonatisierung, Chlorideintrag) kann die passive Deckschicht auf der Stahloberfläche zerstört werden. Im weiteren Verlauf können sich korrosionsbedingte Folgeschäden, wie Risse und Abplatzungen am Bauwerk ergeben. Um notwendige Sanierungsmaßnahmen sind frühzeitige und weitgehend zerstörungsfrei ermittelte Informationen über das aktuelle Korrosionsverhalten der Stahlbewehrung von großer Bedeutung. Die Potentialfeldmessung ist ein etabliertes und weit verbreitetes Verfahren zur Beurteilung des Korrosionszustandes der Bewehrung in Stahlbetonbauwerken. Mit Hilfe dieses Verfahrens können Bereiche aktiv korrodierender Bewehrung zerstörungsfrei lokalisiert werden. In der Regel kommt diese Messmethode bei der Detektion chloridinduzierter Korrosion zum Einsatz. KW - Korrosion KW - Potentialfeldmessung KW - Corrosion PY - 2018 SP - 1 EP - 21 CY - Berlin AN - OPUS4-45048 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino A1 - Burkert, Andreas A1 - Mietz, Jürgen T1 - Corrosion behavior of galvanized reinforcement in chloride containing mortar and carbonated mortar N2 - Korrosionseigenschaften von feuerverzinktem Betonstahl unterscheiden sich grundlegend von herkömmlichen Betonstahl. In diesem Vortrag sind Beispiele für das Korrosionsverhalten in chloridhaltigen und carbonatisierten Mörteln dargestellt T2 - Intergalva 2018 - 25th International Galvanizing Conference CY - Berlin, Germany DA - 17.06.2018 KW - Corrosion KW - Korrosion KW - Verzinkt KW - Betonstahl PY - 2018 SP - 301 EP - 309 AN - OPUS4-45240 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ebell, Gino A1 - Seifert, Lando A1 - Burkert, Andreas T1 - Innovative Korrosionsprüfung für Beton- und Spannstähle T1 - Test methods for corrosion testing of reinforcing and prestressing steels N2 - Korrosion ist einer der maßgeblichen Schädigungsmechanis-men im Stahlbetonbau und limitiert die Nutzungsdauer vonInfrastrukturbauwerken zum Teil erheblich. Dabei differenziertman zwischen verschiedenen Korrosionsvarianten, Korrosioninfolge Karbonatisierung des Betons, chloridinduzierte Korro-sion an Meerwasserbauwerken oder durch Tausalzbelastungund im Fall von Spannstahlbauwerken kann zusätzlich was-serstoffinduzierte Spannungsrisskorrosion (SpRK) auftreten.Für den Einsatz alternativer Betonstähle wie nichtrostenderBetonstahl gilt es, die Höhe des kritischen korrosionsaus-lösenden Chloridgehalts zu bestimmen. Um diesen für diejeweiligen Betonstähle zu ermitteln, fehlen bislang jedochnormativ geregelte Prüfverfahren. Die Empfindlichkeit vonSpannstählen gegenüber SpRK bedarf gemäß aktueller Nor-mung Langzeit-Auslagerungstests, die eine werkseigeneProduktionskontrolle aufgrund der langen Prüfzeiten nahezuunmöglich machen. Ein neu entwickeltes Prüfverfahren unterAnwendung kathodischer Polarisation, das inzwischen imneusten Entwurf der DIN EN ISO 15630–3 aufgenommenwurde, ermöglicht eine Bewertung der SpRK-Empfindlichkeitfür Spanndrähte innerhalb von 24 Stunden. Die Ergebnissetragen zur Verbesserung der Lebensdauerabschätzung undzur Weiterentwicklung von Normen für korrosionsbeständigeBetonstähle und der Robustheitsbewertung von Spannstählenbei. N2 - Corrosion is a primary damage mechanism in reinforced concrete construction, significantly reducing the service life of infrastructure. A categorisation of corrosion is imperative for the comprehension of the subject. The corrosion of concrete can be attributed to the carbonation process, whilst chloride-induced corrosion is prevalent in structures exposed to seawater or by de-icing salt. Additionaly to the former corrosion processe, prestressing steel structures could be also highly susceptible to hydrogen-induced stress corrosion cracking (SCC). In order to utilise alternative reinforcing steels, such as stainless reinforcing steel, it is necessary to ascertain the level of critical chloride threshold that can induce corrosion. Nevertheless, there is an absence of standardised test methods for determining this for the respective reinforcing steels to date. Acc. to current standardization, the sensitivity of prestressing steels to chromium content necessitates long-term ageing tests, which impede in-house production control due to the extended testing times. However, a newly developed test method using cathodic polarization, which has now been included in the latest draft of DIN EN ISO 15630–3, makes it possible to assess the susceptibility of prestressing steels to corrosion cracking within 24 hours. The results of this study will contribute to the improvement of service life estimation and the further development of standards for corrosion-resistant reinforcing steels and the robustness assessment of prestressing steels. KW - Korrosion KW - Spannstahl KW - Nichtrostender Betonstahl KW - Corrosion KW - Prestressing steel KW - Stainless reinforcing steel KW - Wasserstoff KW - Spannungsrisskorrosion KW - Lochkorrosion KW - Hydrogen KW - Stress corrosion cracking KW - Pitting corrosion PY - 2025 DO - https://doi.org/10.1002/best.202500025 SN - 0005-9900 SN - 1437-1006 SP - 1 EP - 8 PB - Ernst CY - Berlin AN - OPUS4-63305 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Potentialfeldmessung in Theorie und Praxis N2 - Durch das alkalische Porenwassermilieu wird Stahl im Beton durch Ausbildung einer Deck-schicht vor Korrosion geschützt. Unter ungünstigen Umgebungsbedingungen (Karbonatisie-rung, Chlorideintrag) kann die passive Deckschicht auf der Stahloberfläche zerstört werden. Im weiteren Verlauf können sich durch Volumenexpansion der Korrosionsprodukte korrosi-onsbedingte Folgeschäden, wie Risse und Abplatzungen am Bauwerk ergeben. Um notwen-dige Sanierungsmaßnahmen sind frühzeitige und weitgehend zerstörungsfrei ermittelte In-formationen über das aktuelle Korrosionsverhalten der Stahlbewehrung von großer Bedeu-tung. Die Potentialfeldmessung ist ein etabliertes und weit verbreitetes Verfahren zur Beur-teilung des Korrosionszustandes der Bewehrung in Stahlbetonbauwerken. Mit Hilfe dieses Verfahrens können Bereiche aktiv korrodierender Bewehrung zerstörungsfrei lokalisiert werden. In der Regel kommt diese Messmethode bei der Detektion chloridinduzierter Korro-sion zum Einsatz. T2 - 3-Länder-Korrosionstagung CY - Zürich, Switzerland DA - 12.04.2018 KW - Korrosion KW - Corrosion KW - Potentialfeldmessung PY - 2018 SN - 978-3-935406-66-6 SP - 123 EP - 128 AN - OPUS4-44697 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Poptential Mapping at Concrete Structures N2 - Die Potentialfeldmessung dient der Lokalisierung aktiv korrodierender Betonstähle in Bauwerken. N2 - Potentialmapping is an electrochemical measurement for the detection of active corroding reinforcement at concrete structures. T2 - NDT&E Advanced Training Workshop 2017 CY - Berlin, Germany DA - 05.07.2017 KW - Corrosion KW - Poptential Mapping PY - 2017 AN - OPUS4-40941 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Performance & Failure Mechanisms of Galvanic Anodes N2 - Galvanic anodes could be used in concrete structures to prevent new anode formation surrounding patch-repaired areas. Therefore so-called galvanic anodes need to be embedded into the fresh concrete with an electroconductive connection to the reinforcement. This anodic area will protect the surrounding reinforcement against forming other anodic areas. T2 - Pre-Consec Workshop 2024 CY - Chennai, India DA - 24.09.2024 KW - Corrosion KW - Galvanic anodes KW - Reinforcement KW - Pitting corrosion PY - 2024 AN - OPUS4-61307 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino A1 - Breit, W. T1 - Investigation of corrosion product layers in chloride containing mortars - "galvanized reinforcement" N2 - In the case of galvanised steel in mortar or concrete, the corrosion behaviour depends on the ion distribution of the pore solution and the pH value. Therefore, a new approach has been developed to determine the corrosion behaviour by single frequency AC measurements and to determine the B-values to calculate the corrosion current density using the Stern-Geary equation. T2 - ICCRRR 2024 CY - Cape Town, South Africa DA - 03.11.2024 KW - Corrosion KW - Galvanized steel PY - 2024 AN - OPUS4-61517 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ebell, Gino T1 - Potentialmessung im Stahlbetonbau N2 - Durch das alkalische Porenwassermilieu wird Stahl im Beton durch Ausbildung einer Deckschicht vor Korrosion geschützt. Unter ungünstigen Umgebungsbedingungen (Karbonatisierung, Chlorideintrag) kann die passive Deckschicht auf der Stahloberfläche zerstört werden. Im weiteren Verlauf können sich durch Volumenexpansion der Korrosionsprodukte korrosionsbedingte Folgeschäden, wie Risse und Abplatzungen am Bauwerk ergeben. Um notwendige Sanierungsmaßnahmen sind frühzeitige und weitgehend zerstörungsfrei ermittelte Informationen über das aktuelle Korrosionsverhalten der Stahlbewehrung von großer Bedeutung. Die Potentialfeldmessung ist ein etabliertes und weit verbreitetes Verfahren zur Beurteilung des Korrosionszustandes der Bewehrung in Stahlbetonbauwerken. Mit Hilfe dieses Verfahrens können Bereiche aktiv korrodierender Bewehrung zerstörungsfrei lokalisiert werden. In der Regel kommt diese Messmethode bei der Detektion chloridinduzierter Korrosion zum Einsatz. T2 - KKS-Messtechnik CY - Online meeting DA - 26.04.2021 KW - Korrosion KW - Potentialfeldmessung KW - Corrosion PY - 2021 AN - OPUS4-52529 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -