TY - JOUR A1 - Bäßler, Ralph A1 - Sobetzki, Joana A1 - Sarmiento Klapper, H. T1 - Korrosionsbeständigkeit: Beurteilung von Werkstoffen für den Einsatz in Geothermieanlagen N2 - Aufgrund der extremen Betriebsbedingungen in Geothermieanlagen des Norddeutschen Beckens ist die Werkstoffauswahl für ober- und untertägige Komponenten entscheidend für einen sicheren und zuverlässigen Betrieb. Im Rahmen der Werkstoffqualifizierung wurden mittels klassischer Auslagerung und elektrochemischen Untersuchungen an zwei hochlegierten Stählen deren Einsatzgrenzen für die Förderung von hochsalinarem Aquiferfluid der geothermischen Tiefbohrung in Groß Schönebeck ermittelt. Die Ergebnisse und daraus resultierende Schlussfolgerungen werden hier vorgestellt. KW - Korrosion KW - Geothermie PY - 2013 SN - 1611-1478 VL - 64 IS - 1 SP - 92 EP - 96 PB - WVGW, Wirtschafts- u. Verl.Ges. Gas und Wasser CY - Bonn AN - OPUS4-27681 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Yevtushenko, Oleksandra A1 - Bäßler, Ralph A1 - Carrillo Salgado, I. T1 - Material challenge for carbon capture and storage - Crevice corrosion susceptibility of super austenitic stainless steel UNS NO8031 (alloy 31) and duplex stainless steel S32101 in CO2 saturated saline brine N2 - Corrosion resistance of duplex stainless Steel UNS S32101 and super austenitic stainless Steel UNS NO8031 (alloy 31) was investigated in crevice conditions in a corrosive environment (saline brine, T = 60 °C, C02-flow rate 3-5 L/h, normal pressure) using electrochemical and metallographic techniques. Rectangular rubber was used to form a metal/non-metal-crevice configuration. Potentiodynamic measurements have been carried out in order to determine critical pitting and repassivation potentials. Potentiostatic measurements at different Potentials have been performed and the dependence of pit depth on the potential applied in crevice conditions was investigated. It was shown that the repassivation potential of duplex stainless Steel S32101 coincides with its corrosion potential. Strang pitting corrosion occurred after potentiodynamic measurements with pit depths up to 100 pm. Otherwise, stainless Steel UNS NO8031 shows about 0.5 V difference between the free corrosion potential and the repassivation potential and did not show any signs of pitting corrosion after polarization measurements. Slight rouging effects have been observed. By potentiostatic measurements on duplex stainless Steel S32101 potentials slightly more positive than the corrosion Potentials causing strong pitting corrosion, and pit depths up to 650 pm were measured. Super austenitic stainless Steel UNS NO8031 did not exhibit any signs of pitting corrosion even by applying potentials much more positive than the corrosion potential. T2 - NACE International Corrosion Conference 2013 CY - Orlando, FL, USA DA - 17.03.2013 KW - CO2 KW - Saturated saline brine KW - Crevice corrosion KW - Pitting corrosion KW - Electrochemical measurements PY - 2013 SN - 978-1-627-48145-8 SP - 1 EP - 8 (Paper 2427) PB - Curran CY - Red Hook, NY AN - OPUS4-28964 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Yevtushenko, Oleksandra A1 - Bäßler, Ralph A1 - Carrillo-Salgado, I. T1 - Corrosion stability of piping steels in a circulating supercritical impure CO2 environment N2 - Within the project COORAL (German acronym for ''C02 purity for capture and storage") studies on pipeline steels exposed to circulating supercritical impure C02 have been carried out. For this purpose, a loop consisting of compressors, flow meter and two autoclaves was constructed. In order to simulate the real conditions in pipelines, impurities such as H20, CO, S02, N02 and 02 were added to the C02 stream before compression. Exposure experiments were carried out with Steel specimens placed in the autoclaves. Carbon Steel L360NB, pure iron X20Cr13, X46Cr13, X2CrMnNiN22-5-2 and alloy 31 have been exposed to circulating (flow rate 4 L/min) supercritical impure C02 for one week at 60 °C and 10 MPa Surface analysis and weight loss experiments in order to determine the corrosion products and the corrosion rates showed that the impurities cause corrosion problems. Slight general corrosion by L360NB and soft iron was observed. The initiation of pitting corrosion was observed at the surfaces of the materials X20Cr13, X46Cr13, X2CrMnNiN22-5-2. No visible signs of corrosion have been observed on alloy 31. T2 - NACE International Corrosion Conference 2013 CY - Orlando, FL, USA DA - 17.03.2013 KW - Supercritical circulating CO2 KW - Impurities KW - Exposure test KW - Corrosion PY - 2013 SN - 978-1-627-48145-8 SP - 1 EP - 11 (Paper 2372) PB - Curran CY - Red Hook, NY AN - OPUS4-28965 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bäßler, Ralph A1 - Yevtushenko, Oleksandra T1 - Metallische Werkstoffe für solarthermische Kraftwerke T2 - Korrosionsschutzseminar "Hochlegierte Stähle und Nickellegierungen für Industrieanlagen und Energietechnik" CY - Dresden, Germany DA - 2013-10-09 PY - 2013 AN - OPUS4-29376 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bäßler, Ralph T1 - Invited Plenary Lecture: Stainless Steels for Use in Alternative Energy Generations Facilities T2 - Stainless Steel World CY - Maastricht, Netherlands DA - 2013-11-12 PY - 2013 AN - OPUS4-29377 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bäßler, Ralph A1 - Sobetzki, Joana A1 - Klapper, Helmuth Sarmiento T1 - Corrosion Resistance of High-Alloyed Materials in Artificial Geothermal Fluids T2 - NACE Corrosion 2013 CY - Orlando, FL, USA DA - 2013-03-17 PY - 2013 AN - OPUS4-29363 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bäßler, Ralph A1 - Sobetzki, Joana A1 - Klapper, Helmuth Sarmiento T1 - Korrosionsuntersuchungen an hochlegierten Werkstoffen in künstlichen Geothermiefluiden unter Betriebsbedingungen T2 - ProcessNet Symposium "Anlagenschäden - Risiken erkennen und vermeiden" CY - Frankfurt am Main, Germany DA - 2013-04-23 PY - 2013 AN - OPUS4-29364 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bäßler, Ralph A1 - Sobetzki, Joana A1 - Klapper, Helmuth Sarmiento T1 - Korrosionsbeständigkeit von höherlegierten Werkstoffen in tiefen Aquiferfluiden T2 - 3-Länder-Korrosionstagung der GfKORR CY - Frankfurt am Main, Germany DA - 2013-04-25 PY - 2013 AN - OPUS4-29365 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bäßler, Ralph A1 - Sobetzki, Joana A1 - Klapper, Helmuth Sarmiento T1 - Corrosion Resistance of High-Alloyed Materials in Artificial Geothermal Brines T2 - European Geothermal Congress CY - Pisa, Italy DA - 2013-06-03 PY - 2013 AN - OPUS4-29368 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bäßler, Ralph T1 - Beständigkeit von Ti-Legierungen in anorganischen Säuren bei 200°C T2 - VDM - Korrosionsgespräch "Korrosion an hochlegierten Werkstoffen" CY - Altena, Germany DA - 2013-08-28 PY - 2013 AN - OPUS4-29369 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -