含CO的饱和地层水中沉积物下碳钢的微生物影响腐蚀

Microbiologically Influenced Corrosion of Carbon Steel Beneath a Deposit in CO-Saturated Formation Water Containing .

作者信息

Liu Hongwei, Meng Guozhuo, Li Weihua, Gu Tingyue, Liu Hongfang

机构信息

School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, China.

Department of Chemical and Biomolecular Engineering, Institute for Corrosion and Multiphase Technology, Ohio University, Athens, OH, United States.

出版信息

Front Microbiol. 2019 Jun 12;10:1298. doi: 10.3389/fmicb.2019.01298. eCollection 2019.

The corrosion mechanism of carbon steel under deposit in the presence of sulfate reducing bacterium (SRB) was studied using surface analysis, weight loss and electrochemical measurements. Results showed that both the general corrosion and localized corrosion were considerably promoted by SRB under deposit. The corrosion rate of steel in the presence of SRB was approximately 6 times of that for the control according to the weight loss measurements. The maximum corrosion pit depth in the presence of SRB was approximately 7.7 times of that of the control. Both the anodic and cathodic reactions were significantly accelerated by SRB. A galvanic effect in the presence of SRB due to the heterogeneous biofilm led to serious localized corrosion.