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 T2 - NACE International corrosion conference 2013 (Proceedings) 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 - GEN A1 - Yevtushenko, Oleksandra A1 - Bäßler, Ralph ED - Lexow, J. ED - Kishi, T. ED - Kitagawa, M. ED - Böllinghaus, T. T1 - Electrochemical studies on pitting corrosion on Cr13 steel exposed to CO2 and artificial brine with high chloride concentration T2 - Materials challenges and testing for supply of energy and resources N2 - Within the project COORAL (German acronym for 'CO2 purity for capture and storage') first studies on piping steels exposed to CO2 and artificial brine with high chloride concentration have been carried out. Corrosion behavior of martensitic Cr13 steel (1.4034) was investigated in a corrosive environment (artificial saline brine, T = 60 °C, CO2-flow rate 3 – 5 L/h, atmospheric pressure, exposure times from 1 h up to 14 days) using electrochemical and metallographic techniques. Different corrosion kinetics were observed as a function of exposure times and chloride concentration in the artificial brine. In CO2-saturated brine pitting corrosion was observed at free corrosion potential, whereas in the brine without addition of NaCl a stable passive layer built up. Predictions about corrosion mechanism are made and verified by means of surface analytical techniques. KW - Stainless steel KW - Pitting corrosion KW - Electrochemistry KW - Carbon dioxide PY - 2012 SN - 978-3-642-23347-0 SN - 978-3-642-23348-7 SP - 45 EP - 53 PB - Springer CY - Berlin Heidelberg AN - OPUS4-27393 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bäßler, Ralph A1 - Yevtushenko, Oleksandra A1 - Carrillo Salgado, I. T1 - Corrosion behavior of highly alloyed steels in artificial saline aquifer fluids containing carbon dioxide JF - Physicochemical mechanics of materials KW - Highly alloyed steels KW - Carbon dioxide KW - Pitting corrosion PY - 2012 SN - 0430-6252 VL - 9 IS - 2 SP - 393 EP - 396 CY - L'viv, Ukrainian national academy of science AN - OPUS4-26056 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -