酸性土壤浸出液中X80钢微生物腐蚀研究： (I) 电化学分析

doi:10.11902/1005.4537.2014.044

中国腐蚀与防护学报

2014, Vol. 34

Issue (4): 346-352 DOI: 10.11902/1005.4537.2014.044

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酸性土壤浸出液中X80钢微生物腐蚀研究： (I) 电化学分析

吴堂清¹, 丁万成², 曾德春³, 徐长峰³, 闫茂成¹, 许进¹, 于长坤¹, 孙成¹

1. 中国科学院金属研究所金属腐蚀与防护国家重点实验室沈阳 110016; 2. 中石油新疆油田分公司克拉玛依 834000; 3. 新疆油田油气储运分公司克拉玛依 834002

Microbiologically Induced Corrosion of X80 Pipeline Steel in an Acid Soil Solution: (I) Electrochemical Analysis

WU Tangqing¹, DING Wancheng², ZENG Dechun³, XU Changfeng³, YAN Maocheng¹, XU Jin¹, YU Changkun¹, SUN Cheng¹

1. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; 2. Xinjiang Oilfield Branch, China National Petroleum Corporation, Karamay 834000, China; 3. Oil-Gas Storage and Transportation Company, Xinjiang Oilfield Branch, Karamay 834002, China

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摘要: 利用微生物和电化学方法研究了X80管线钢在一种酸性土壤浸出液中的硫酸盐还原菌 (SRB) 腐蚀电化学特征。结果表明,刚接种到酸性土壤浸出液中的SRB需要重新适应环境,该过程导致细菌数量大幅降低；接菌土壤浸出液中管线钢的开路电位低于灭菌土壤浸出液中的；实验前期活性生物膜对管线钢腐蚀起抑制作用,后期微生物代谢产物促进管线钢的腐蚀；SRB活动改变了金属/溶液的电介质性质,是实验后期促进管线钢腐蚀的重要原因。

关键词 ：硫酸盐还原菌, X80管线钢, 酸性土壤浸出液, 电化学阻抗谱

Abstract：Electrochemical characteristics of sulphate-reducing bacteria (SRB) induced corrosion of X80 pipeline steel were studied in an acid soil solution by mean of microbiological test methods and electrochemical techniques. The results showed that there exist a period for the newly-inoculated bacteria to be acclimatized to the new environment, during which death of large quantity of bacteria did occur; the open circuit potential of the steel is always lower in the inoculated soil solution than that in the sterile environment; SRB inhibits the corrosion process of the steel in the early stage and accelerates the corrosion process in the later stage during the experiment; while the activity of SRB alters the dielectric of the metal/solution interface, which is responsible for the increase of the corrosion rate of the pipeline steel in the later stage of the experiment.

Key words： sulphate-reducing bacteria X80 pipeline steel acid soil solution electrochemical impedance spectroscopy

收稿日期: 2014-04-10

ZTFLH:

TG172.4

基金资助:国家自然科学基金项目(50971128和51131001)及国家科技基础条件平台建设项目(2005DKA10400CT-2-02)资助

通讯作者: 通讯作者：孙成,E-mail：chengsun@imr.ac.cn E-mail: chengsun@imr.ac.cn

作者简介: 吴堂清，男，1987年生，博士生，研究方向为微生物作用下管线钢环境致裂行为

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引用本文:

吴堂清, 丁万成, 曾德春, 徐长峰, 闫茂成, 许进, 于长坤, 孙成. 酸性土壤浸出液中X80钢微生物腐蚀研究： (I) 电化学分析[J]. 中国腐蚀与防护学报, 2014, 34(4): 346-352.
WU Tangqing, DING Wancheng, ZENG Dechun, XU Changfeng, YAN Maocheng, XU Jin, YU Changkun, SUN Cheng. Microbiologically Induced Corrosion of X80 Pipeline Steel in an Acid Soil Solution: (I) Electrochemical Analysis. Journal of Chinese Society for Corrosion and protection, 2014, 34(4): 346-352.

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https://www.jcscp.org/CN/10.11902/1005.4537.2014.044 或 https://www.jcscp.org/CN/Y2014/V34/I4/346

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