TY - CONF A1 - An, Biwen Annie A1 - Kunte, Hans-Jörg A1 - Koerdt, Andrea ED - Eibergen, N. ED - Poulassichidis, T. T1 - Microbiologically Influenced Corrosion (MIC) by Halophilic (Salt-Loving) Nitrate and Sulfate-Reducing Microorganisms N2 - The survey of Canadian shale sites showed a dominance of halophilic microorganisms, including Halomonas (HA). Nitrate-amended incubations of the field samples under high salinity (14.6% NaCl), revealed a dominance of HA (>72%) and an accumulation of nitrite. Nitrite accumulation directly inhibited the growth of SRB, thereby decreasing their souring and corrosion risks. However, accumulated nitrite may also contribute to iron corrosion, which will be tested by using different concentrations of nitrate as an electron acceptor to HA. Different salinities are further tested on HA strains supplemented with iron coupons to determine their effects on iron corrosion rates. HA incubated with separate cultures of corrosive methanogen and SRB were tested to determine whether a positive or adverse effect will occur between them. Lastly, analyses of iron coupons will be conducted using TOF-SIMS, FIB-SEM and EDS for corrosion product characterization T2 - Corrosion 2021 CY - Online Meeting DA - 19.04.2021 KW - MIC KW - Bacteria KW - Halophile KW - Corrosion KW - Environmental condition KW - Korrosion KW - High salinity PY - 2021 UR - https://my.nace.org/PaperTrail/Authors/Submission.aspx?id=2914f145-7f8f-ea11-813a-005056a95a7c SP - Paper C2021-16284, 1 AN - OPUS4-52479 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Koerdt, Andrea T1 - Euro-MIC 2021-2025, our journey, and paths forward N2 - Microbiologically Influenced Corrosion (MIC) refers to the detrimental effects on materials caused by microorganisms, and it is becoming an increasingly significant issue for society. Unlike the USA, Canada, and Australia, Europe has less developed cooperation on MIC. Although several research groups and industrial stakeholders are addressing MIC, discussions remain fragmented, and information exchange is limited. A truly transdisciplinary approach is rarely seen. As a result, Europe often relies on methods, preventive measures, and standards from other regions, as there are no equivalent European standards. This situation makes Europe a) highly dependent, and b) in some cases, unable to use certain measures or standards due to European legal restrictions (e.g., the use of biocides). In 2021, researchers established the “Euro-MIC” network, financially supported by the EU project “COST-Action,” to tackle these issues. Through COST-Action, Euro-MIC aims to facilitate necessary interactions, communication, knowledge sharing, and training for personnel and researchers across various disciplines. COST-Action supports network activities, workshops, training schools, conferences, and more. Euro-MIC aspires to position Europe as a leader in MIC, promoting ideas on par with other nations while upholding European values and ensuring greater protection for people, property, and the environment. In this presentation, I will briefly introduce the principles of COST Action and highlight the significant opportunities provided by this EU-funded project. COST Action fosters interdisciplinarity, networking, training, scientific exchange, and the promotion of young scientists. By showcasing some examples of CA20130 COST ACTION Euro-MIC, I hope to demonstrate that COST Action is not only relevant for addressing MIC but can also be applied to other important topics and sectors. T2 - Unseen Corrosion: Unveiling Hidden Threats and Innovating Monitoring Solutions CY - Bergen, Norway DA - 15.05.2025 KW - COST Action CA20130 KW - MIC KW - Network KW - Corrosion KW - Microorganisms PY - 2025 UR - https://www.norceresearch.no/en/events/unseen-corrosion AN - OPUS4-63726 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Koerdt, Andrea T1 - Exploring Microbial Impacts on Hydrogen Storage: - A Novel System for Corrosion Testing of Gas- and Material Degradation N2 - Underground hydrogen storage (UHS) is a strategic step towards implementing the hydrogen economy. Achieving the required infrastructure by 2050 necessitates advancements in hydrogen-dedicated assets and the evaluation of existing infrastructure. The unique conditions in UHS require an experimental set-up to simulate UHS operating conditions, which allows to assess the readiness of current storage and transmission for hydrogen, and develop new technologies for material-resistance, operational-simulations, and risk-assessments. In addition to the physical/chemical conditions in UHS (e.g., salinity, hydrogen concentration, operating temperature/-pressure, water content), biological threats must also be considered. Therefore, we present here a high-pressure-set-up, developed for research/-industrial testing purposes. Currently, UHS-experiments for microbiologically-influenced-corrosion (MIC) are performed in standard autoclaves with relatively high volumes/pressures; they were primarily designed for material-specific investigations. While these methods provided some useful information for biological questions, they had significant limitations. The novel UHS-simulation-set-up presented here is designed with a controlled independently temperature and pressure. Field samples can be used to mimic geology, water chemistry, construction materials, and microbiological conditions. Most significant advantages of the set-up are: 1. It allows for liquid addition during the test, enabling the study of biocides or the evaluation of operating setups. 2. It permits liquid/-gas sampling during the test, allowing for more efficient monitoring of testing conditions and a better understanding of the process over time. Additionally, a low-release function is added, which is particularly important for studying MIC to avoid negative side effects, on the material (e.g. polymers/corrosion product-layer/cells itself) which might occur due to the fast pressure release T2 - ISMOS10 CY - Nashville, TN, USA DA - 11.08.2025 KW - MIC KW - MISTRAL KW - Corrosion KW - Environmental simulation KW - Metall KW - Polymer PY - 2025 AN - OPUS4-64297 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Koerdt, Andrea A1 - Gerengi, Husnu A1 - Kaya, Ertugrul A1 - M. Solomon, Moses A1 - Snape, Matthew T1 - Advances in the Mitigation of Microbiologically Influenced Concrete Corrosion: A Snapshot N2 - Concrete, a versatile construction material, faces pervasive deterioration due to microbiologically influenced corrosion (MIC) in various applications, including sewer systems, marine engineering, and buildings. MIC is initiated by microbial activities such as involving sulfate-reducing bacteria (SRB), sulfur-oxidizing bacteria (SOB), etc., producing corrosive substances like sulfuric acid. This process significantly impacts structures, causing economic losses and environmental concerns. Despite over a century of research, MIC remains a debated issue, lacking standardized assessment methods. Microorganisms contribute to concrete degradation through physical and chemical means. In the oil and gas industry, SRB and SOB activities may adversely affect concrete in offshore platforms. MIC challenges also arise in cooling water systems and civil infrastructures, impacting concrete surfaces. Sewer systems experience biogenic corrosion, primarily driven by SRB activities, leading to concrete deterioration. Mitigation traditionally involves the use of biocides and surface coatings, but their long-term effectiveness and environmental impact are questionable. Nowadays, it is important to design more eco-friendly mitigation products. The microbial-influenced carbonate precipitation is one of the green techniques and involves incorporating beneficial bacteria with antibacterial activity into cementitious materials to prevent the growth and the formation of a community that contains species that are pathogenic or may be responsible for MIC. These innovative strategies present promising avenues for addressing MIC challenges and preserving the integrity of concrete structures. This review provides a snapshot of the MIC in various areas and mitigation measures, excluding underlying mechanisms and broader influencing factors. KW - MIC KW - Corrosion KW - Concrete KW - Environment PY - 2024 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-619218 DO - https://doi.org/10.3390/ma17235846 VL - 17 IS - 23 SP - 1 EP - 19 PB - MDPI AN - OPUS4-61921 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Malefioudaki, Mariella A1 - Misra, Archismita A1 - Sbeity, Nadja A1 - Zueco-Vincelle, Juan A1 - Laguna-Bercero, Miguel A. A1 - Koerdt, Andrea A1 - Martín-Rapún, Rafael A1 - Mitchell, Scott G. T1 - Multifunctional polyoxomolybdate ionic liquid coatings for mitigating microbiologically influenced corrosion N2 - Corrosion of metals and other materials in marine environments poses significant economic, operational, safety, and environmental challenges across the oil and gas industry, the renewable energy sector, and maritime infrastructure. Microbiologically influenced corrosion (MIC) accounts for a substantial portion of this corrosion, with sulfate-reducing bacteria (SRB) and methanogenic archaea (MA) being key contributors. Conventional methods such as cathodic polarization have proven insufficient in mitigating the colonization of corrosive microbial communities in real marine environments, requiring the development of alternative, broad-spectrum antimicrobial strategies to prevent such biofilm formation. Recently, molybdate has emerged as a potential alternative to traditional biocides and nitrate. Our hypothesis is polyoxometalate-ionic liquids (POM-ILs), which exhibit antimicrobial and anticorrosion properties, could have a broader spectrum of antimicrobial activity than demonstrated until now and could be capable of shielding and protecting sensitive metal surfaces from the extreme acidic environments produced by MIC microorganisms. Here we show how two prototype polyoxomolybdate-based POM-ILs, [(CH3(CH2)6)4N]2[Mo6O19] and [(CH3(CH2)6)4N]4[Mo8O26], demonstrated antimicrobial activity at microgram per millilitre concentrations, prevented biofilm formation on metal surfaces, and provided resistance to corrosive acidic environments. Furthermore, impedance measurements were commensurate with electron microscopy studies showing that POM-IL-coated brass coupons withstood extremely corrosive environments. These proof-of-concept results demonstrate how multi-functional POM-IL coatings represent promising MIC mitigation solutions by providing a hydrophobic acid-resistant and biocidal protective layer that prevents biocolonisation and acidic corrosion by MIC microorganisms. KW - Polyoxometalates KW - Ionic liquid KW - Microbiologically influenced corrosion KW - Corrosion KW - Heritage preservation PY - 2025 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-631951 DO - https://doi.org/10.1039/d5mh00373c SN - 2051-6347 VL - 12 IS - 13 SP - 4648 EP - 4661 PB - Royal Society of Chemistry (RSC) CY - Cambridge AN - OPUS4-63195 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -