Effect of H 2 O Content on the Corrosion Behavior of X52 Steel in Supercritical CO 2 Streams Containing O 2, H 2 S, SO 2 and NO 2 Impurities

Jia Liu (), Dengzun Yao, Kai Chen, Chao Wang, Chong Sun (), Huailiang Pan, Fanpeng Meng, Bin Chen and Lili Wang
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Jia Liu: China Petroleum Pipeline Engineering Corporation, Langfang 065000, China
Dengzun Yao: China Petroleum Pipeline Research Institute Co., Ltd., Langfang 065000, China
Kai Chen: China Petroleum Pipeline Engineering Corporation, Langfang 065000, China
Chao Wang: China Petroleum Pipeline Research Institute Co., Ltd., Langfang 065000, China
Chong Sun: School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
Huailiang Pan: China Petroleum Pipeline Engineering Corporation, Langfang 065000, China
Fanpeng Meng: China Petroleum Pipeline Engineering Corporation, Langfang 065000, China
Bin Chen: China Petroleum Pipeline No.2 Engineering Company, Xuzhou 221000, China
Lili Wang: China Petroleum Pipeline Engineering Corporation, Langfang 065000, China

Energies, 2023, vol. 16, issue 17, 1-13

Abstract: In this study, the corrosion behavior of X52 pipeline steel affected by H 2 O content in supercritical CO 2 streams containing O 2 , H 2 S, SO 2 and NO 2 impurities was investigated by the weight loss test and surface characterization. The corrosion differences of the steel in impure supercritical CO 2 streams containing different H 2 O contents were analyzed. The influence of the variation of H 2 O content on the corrosion mechanism of steel in the complex impurity-containing supercritical CO 2 streams was discussed. The results show that the H 2 O content limit is 100 ppmv in supercritical CO 2 streams containing 200 ppmv O 2 , 200 ppmv H 2 S, 200 ppmv SO 2 and 200 ppmv NO 2 at 10 MPa and 50 °C. The impurities and their interactions significantly promote the formation of corrosive aqueous phase, thereby exacerbating the corrosion of X52 steel. The corrosion process of X52 steel in the environment with a low H 2 O content is controlled by the products of impurity reactions, whereas the impurities and the products of impurity reactions jointly control the corrosion process of the steel in the environment with a high H 2 O content.

Keywords: supercritical CO 2; H 2 O content; impurity; corrosion; corrosion product film (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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