Microbiologically influenced corrosion inhibition induced by S. putriefaciens mineralization under extracellular polymeric substance regulation via FlrA and FlhG genes

被引：18

作者：

Lou, Yuntian ^{[1
,2
,3
]}

Chang, Weiwei ^{[1
,2
]}

Cui, Tianyu ^{[1
,2
]}

Qian, Hongchang ^{[1
,2
,3
]}

Hao, Xiangping ^{[1
,2
,3
]}

Zhang, Dawei ^{[1
,2
,3
]}

机构：

[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing Adv Innovat Ctr Mat Genome Engn, 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, Shunde Innovat Sch, BRI Southeast Asia Network Corros & Protect MOE, Foshan 528399, Peoples R China

来源：

CORROSION SCIENCE | 2023年 / 221卷

基金：

中国博士后科学基金;

关键词：

Microbiologically influenced corrosion; inhibition; Microbial mineralization; Shewanella putrefaciens; Carbon steel; Corrosion protection; CALCIUM-CARBONATE; STEEL;

D O I：

10.1016/j.corsci.2023.111350

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of microbially-induced mineralization on the corrosion inhibition of carbon steel was investigated using & UDelta;flrA and & UDelta;flhG mutant strains of Shewanella putrefaciens. Deletion of FlrA and FlhG genes could induce the up/down-regulation of extracellular polymeric substance (EPS) expression, respectively, without interfering the bacterial growth. Compared to the wild-type strain, the & UDelta;flrA mutant exhibited a -26 % increase in corrosion inhibition rate due to its significantly higher mineralization rate and formation of a high-quality mineralized layer. The & UDelta;flhG mutant retained mineralization ability, but the discontinuous mineralized products failed to inhibit corrosion, and the corrosion rate increased by -1.7 times.

引用

页数：12

共 39 条

[1] Contrasting initial events of localized corrosion on surfaces of 2219-T42 and 6061-T6 aluminum alloys exposed in Caribbean seawater [J].