物理化学学报 >> 2012, Vol. 28 >> Issue (11): 2659-2668.doi: 10.3866/PKU.WHXB201208243

电化学和新能源 上一篇    下一篇

尿素对土壤中碳钢微生物腐蚀的影响

孙成, 李喜明, 许进, 闫茂成, 王福会, 王振尧   

  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
  • 收稿日期:2012-06-12 修回日期:2012-08-22 发布日期:2012-10-17
  • 通讯作者: 孙成 E-mail:chengsun@imr.ac.cn
  • 基金资助:

    国家自然科学基金(50971128, 51161001)及国家科技基础条件平台建设项目(2005DKA10400-CT-2-02)资助

Effect of Urea on Microbiologically Induced Corrosion of Carbon Steel in Soil

SUN Cheng, LI Xi-Ming, XU Jin, YAN Mao-Cheng, WANG Fu-Hui, WANG Zhen-Yao   

  1. State Key Laboratory for Corrosion and Protection, Institute of Metals Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China
  • Received:2012-06-12 Revised:2012-08-22 Published:2012-10-17
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (50971128, 51161001) and National RD Infrastructure and Facility Development Program of China (2005DKA10400-CT-2-02).

摘要:

采用失重、极化曲线和阻抗谱等方法研究了尿素对土壤中微生物腐蚀(MIC)的影响. 研究结果表明, 在接菌土壤中尿素加速碳钢的腐蚀, 而在灭菌土壤中抑制其腐蚀. 接菌土壤中由于硫酸盐还原菌(SRB)的存在,腐蚀产物中检测到FeS2. 电化学阻抗谱(EIS)的结果表明, 在实验后期腐蚀过程由浓差极化控制.

关键词: 硫酸盐还原菌, 碳钢, 尿素, 电化学阻抗谱, 失重

Abstract:

The effect of urea on microbiologically induced corrosion (MIC) of carbon steel in soil was investigated using weight-loss measurement, electrochemical polarization, and electrochemical impedance spectroscopy (EIS). Urea tends to accelerate corrosion of carbon steel in inoculated soils and inhibit corrosion in sterile soils. In inoculated soils, FeS2 was detected in corrosion products because of the presence of sulfate-reducing bacteria (SRB). The EIS results showed that the process was controlled by concentration polarization in the later stages.

Key words: Sulphate-reducing bacteria, Carbon steel, Urea, Electrochemical impedance spectroscopy, Weight loss

MSC2000: 

  • O646