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溶解氧浓度对嗜盐古菌影响Q235碳钢微生物腐蚀的作用

Effect of Dissolved Oxygen Concentration on the Microbiologically Influenced Corrosion of Q235 Carbon Steel by Halophilic Archaeon .

作者信息

Qian Hongchang, Ju Pengfei, Zhang Dawei, Ma Lingwei, Hu Yuting, Li Ziyu, Huang Luyao, Lou Yuntian, Du Cuiwei

机构信息

Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, China.

Shanghai Aerospace Equipment Manufacturer, Shanghai, China.

出版信息

Front Microbiol. 2019 Apr 25;10:844. doi: 10.3389/fmicb.2019.00844. eCollection 2019.

DOI:10.3389/fmicb.2019.00844
PMID:31073296
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6495067/
Abstract

The influence of dissolved oxygen concentration (DOC) on the microbiologically influenced corrosion (MIC) of Q235 carbon steel in the culture medium of halophilic archaeon was investigated. The increase of DOC from 0.0 to 3.0 ppm was found to strengthen the oxygen concentration cell by promoting cathodic reaction. Meanwhile, the increased DOC also promoted archaeal cell growth, which could consume more metallic iron as energy source and aggravated the localized corrosion. When the DOC further increased to 5.0 ppm, the uniform corrosion was dominant as the biofilms became uniformly presented on the steel surface. Combined with the stronger inhibition effect of oxygen diffusion by the increased biofilm coverage, the MIC of carbon steel in the 5.0 ppm medium was weaker than that in the 3.0 ppm medium. From weight loss and electrochemical tests, the results all demonstrated that the carbon steel in the 3.0 ppm medium had the largest corrosion rate.

摘要

研究了溶解氧浓度（DOC）对嗜盐古菌培养基中Q235碳钢微生物腐蚀（MIC）的影响。发现DOC从0.0 ppm增加到3.0 ppm会通过促进阴极反应来增强氧浓差电池。同时，增加的DOC也促进了古菌细胞的生长，这会消耗更多的金属铁作为能源并加剧局部腐蚀。当DOC进一步增加到5.0 ppm时，由于生物膜在钢表面均匀呈现，均匀腐蚀占主导地位。结合增加的生物膜覆盖率对氧扩散的更强抑制作用，5.0 ppm培养基中碳钢的微生物腐蚀比3.0 ppm培养基中的弱。通过失重和电化学测试，结果均表明3.0 ppm培养基中的碳钢腐蚀速率最大。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/66a8/6495067/62e15d8c45fb/fmicb-10-00844-g011.jpg
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