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 -