Insights into the corrosion evolution of X65 steel in water-saturated supercritical CO2 streams containing O2 and SO2 impurities

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-06-19 DOI:10.1016/j.corsci.2025.113126

Xiaofeng Zhao, Chong Sun, Jianbo Sun, Weijian Yang, Xueqiang Lin

引用次数: 0

Abstract

The corrosion evolution behavior of X65 steel in water-saturated supercritical CO₂ streams with the impurities of 1000 ppmv O₂ and 1000 ppmv SO₂ at 8 MPa and 50 ºC was investigated mainly by in-situ observation and electrochemical measurement. H₂SO₄ generated by impurity reaction promotes the precipitation of aqueous phase and dominates the FeSO₄ film formation at the initial corrosion stage. With the corrosion proceeds, the corrosion product film with outer FeOOH layer and inner FeSO₄ layer ultimately forms due to the oxidation of FeSO₄. The time-dependent variation of corrosion kinetics is closely associated with the evolution of corrosion product film characteristics. A schematic model is established to depict the corrosion evolution process.

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X65钢在含O2和SO2杂质的水饱和超临界CO2流中的腐蚀演变

研究了X65钢在含杂质为1000 ppmv O2和1000 ppmv SO2的水饱和超临界CO2流中，在8 MPa和50℃条件下的腐蚀演变行为。杂质反应生成的H2SO4促进了水相的析出，并在腐蚀初期主导了FeSO4膜的形成。随着腐蚀的进行，由于FeSO4氧化，最终形成外层FeOOH层和内层FeSO4层的腐蚀产物膜。腐蚀动力学随时间的变化与腐蚀产物膜特性的演变密切相关。建立了描述腐蚀演化过程的示意图模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.