Synergistic effect of chloride ions and filmed surface on pitting in the pseudo-passivation behavior of carbon steel

被引：23

作者：

Zhang, Shaohua ^{[1
]}

Li, Yanrui ^{[1
]}

Wei, Yinghui ^{[1
,2
]}

Liu, Baosheng ^{[1
]}

Du, Huayun ^{[2
]}

Wei, Huan ^{[2
]}

Hou, Lifeng ^{[2
]}

机构：

[1] Taiyuan Univ Sci & Technol, Coll Mat Sci & Engn, Taiyuan 030024, Shanxi, Peoples R China

[2] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Shanxi, Peoples R China

来源：

VACUUM | 2021年 / 185卷

基金：

中国国家自然科学基金;

关键词：

Pseudo-passivation; Carbon steel; HCO3-; Cl-; Pitting; CORROSION BEHAVIOR; PIPELINE STEEL; CO2; CORROSION; BICARBONATE; OIL; RESISTANCE; MECHANISM;

D O I：

10.1016/j.vacuum.2020.110042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper describes the pseudo-passivation behavior of carbon steel exposed to saturated CO2 solutions containing HCO3- (small quantities) along with the presence of Cl-. Results reveal the effect of increase of Cl- concentration in such a way as to contribute to the anodic dissolution rate of the filmed surface, and the pitting remains adequate dependence on the formation of film, which mainly arises from the presence of HCO3-. In the growth process of FeCO3, the formation of oxygen-diffusion layer around the FeCO3 corrosion products can be mainly explained by the gradual decrease of formation reactions of FeCO3 with the less adsorption of HCO3- at the position far away from the FeCO3 surface.

引用

页数：4

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