Multi-mode scanning electrochemical microscopic study of microbiologically influenced corrosion mechanism of 304 stainless steel by thermoacidophilic archaea

被引：28

作者：

Qian, H. C. ^{[1
,2
,3
]}

Chang, W. W. ^{[1
,2
]}

Cui, T. Y. ^{[1
,2
]}

Li, Z. ^{[1
,2
]}

Guo, D. W. ^{[4
,5
]}

Kwok, C. T. ^{[4
]}

Tam, L. M. ^{[4
,5
]}

Zhang, D. W. ^{[1
,2
,3
]}

机构：

[1] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Natl Mat Corros & Protect Data Ctr, Beijing 100083, Peoples R China

[3] Univ Sci & Technol Beijing, BRI Southeast Asia Network Corros & Protect MOE, Shunde Grad Sch, Foshan 528399, Peoples R China

[4] Univ Macau, Dept Electromech Engn, Macau 999078, Peoples R China

[5] Inst Dev & Qual, Macau 999078, Peoples R China

来源：

CORROSION SCIENCE | 2021年 / 191卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Microbiologically influenced corrosion; Stainless steels; Scanning electrochemical microscopy; SULFATE-REDUCING BACTERIA; IRON-OXIDIZING BACTERIA; CARBON-STEEL; PITTING CORROSION; BIOCORROSION; RESOLUTION; BEHAVIOR; SECM;

D O I：

10.1016/j.corsci.2021.109751

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, different modes of scanning electrochemical microscopy (SECM) were employed to study the biofilm morphology, oxygen concentration distribution and Fe2+ oxidation metabolism during the microbiologically influenced corrosion (MIC) of 304 stainless steel caused by the thermoacidophilic archaeon Metallosphaera cuprina. The results of in situ SECM study suggested that the decrease in the concentration of organic nutrients forced the M. cuprina biofilms to use Fe2+ as an electron donor and consume more Fe2+ from the pitting corrosion, which accelerated anodic dissolution and led to aggravated pitting corrosion of stainless steel.

引用

页数：9

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