The effects of Methanococcus maripaludis on the corrosion behavior of EH40 steel in seawater.

Shiqiang Chen, Hao Deng, Yudi Zhao, Shihang Lu, Yao Zhao, Xin Cheng, Guangzhou Liu, Wenwen Dou, Jvna Chen

Bioelectrochemistry (Amsterdam, Netherlands) 2021 Aug

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The corrosion behavior of EH40 steel in seawater enriched with Methanococcus maripaludis was investigated through electrochemical methods and surface analysis techniques. The results revealed that the hydrogenotrophic M. maripaludis strain can utilize acetate as an alternative energy source. Corrosion of EH40 steel is initially inhibited, but prolonged exposure with the methanogen leads to an eventual corrosion propagation. During the early stage of immersion in M. maripaludis culture medium, the formation of a protective corrosion products film inhibits EH40 steel corrosion. The presence of M. maripaludis promotes both anodic and cathodic reactions of EH40 steel in the late stage of exposure. Surface analyses revealed that pitting corrosion is closely related to uneven distribution of M. maripaludis biofilm on EH40 steel surface. Copyright © 2021 Elsevier B.V. All rights reserved.

Citation

Shiqiang Chen, Hao Deng, Yudi Zhao, Shihang Lu, Yao Zhao, Xin Cheng, Guangzhou Liu, Wenwen Dou, Jvna Chen. The effects of Methanococcus maripaludis on the corrosion behavior of EH40 steel in seawater. Bioelectrochemistry (Amsterdam, Netherlands). 2021 Aug;140:107824