Comparative study on the corrosion behavior of X52, 3Cr, and 13Cr steel in an O2–H2O–CO2 system: products, reaction kinetics, and pitting sensitivity

• Published in: International journal of minerals, metallurgy and materials Vol. 24; no. 6; pp. 646 - 656
• Main Authors: Luo, Bing-wei, Zhou, Jie, Bai, Peng-peng, Zheng, Shu-qi, An, Teng, Wen, Xiang-li
• Format: Journal Article
• Language: English
• Published: Beijing University of Science and Technology Beijing 01.06.2017; Springer Nature B.V; Beijing Key Laboratory of Failure,Corrosion and Protection of Oil/Gas Facilities,Department of Materials Science and Engineering,China University of Petroleum,Beijing 102249,China
• Subjects: Carbon dioxide; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Chromium; Comparative studies; Composites; Corrosion; Corrosion and Coatings; Corrosion products; Corrosion rate; Corrosion resistance; Corrosion resistant steels; Corrosion tests; Glass; Iron carbonate; Low alloy steels; Martensitic stainless steels; Materials Science; Metallic Materials; Natural Materials; Pitting (corrosion); Reaction kinetics; Steel; Surfaces and Interfaces; Thin Films; Tribology; Uniform attack (corrosion); carbon dioxide; iron oxide; iron carbonate; corrosion; pitting sensitivity; oxygen
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-017-1447-9

The corrosion behaviors of X52, 3Cr low-alloy steel, and 13Cr stainless steel were investigated in an O2–H2O–CO2 environment at various temperatures and O2–CO2 partial-pressure ratios. The results showed that the corrosion rates of X52, 3Cr, and 13Cr steels increased with increasing temperature. The corrosion rates slowly increased at temperatures less than 100°C and increased sharply when the temperature exceeded 100°C. In the absence of O2, X52, 3Cr, and 13Cr exhibited uniform corrosion morphology and Fe CO3 was the main corrosion product. When O2 was introduced into the system, various forms of Fe2O3 appeared on the surface of the samples. The Cr content strongly influenced the corrosion resistance. The 3Cr steel with a low Cr content was more sensitive to pitting than the X52 or 13Cr steel. Thus, pitting occurred on the surface of 3Cr when 1.25 MPa of O2 was added; this phenomenon is related to the non-uniform distribution of Crin 3Cr.