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 - Yevtushenko, Oleksandra A1 - Bäßler, Ralph A1 - Carrillo-Salgado, I. T1 - Corrosion resistance of piping steels in circulating supercritical impure CO2 environment due to moisture, SO2 and NO2 impurities T2 - EUROCORR 2013 CY - Estoril, Portugal DA - 2013-09-01 PY - 2013 AN - OPUS4-28968 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 - Corrosion stability of piping steels in a circulating supercritical impure CO2 environment T2 - NACE 2013 CY - Orlando, FL, USA DA - 2013-03-17 PY - 2013 AN - OPUS4-27065 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 CCS - crevice corrosion susceptibility of alloy 31 and duplex steel S32101 in CO2 saturated saline brine T2 - NACE 2013 CY - Orlando, FL, USA DA - 2013-03-17 PY - 2013 AN - OPUS4-27066 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Yevtushenko, Oleksandra A1 - Bäßler, Ralph T1 - Elektrochemische Untersuchungen in Nitratsalzschmelzen T2 - GfKorr Arbeitskreissitzung Korrosion und Korrosionsschutz von Eisen und Stahl CY - Duisburg, Germany DA - 2013-12-03 PY - 2013 AN - OPUS4-29686 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -