物理化学学报 >> 2010, Vol. 26 >> Issue (12): 3203-3211.doi: 10.3866/PKU.WHXB20101221

电化学 上一篇    下一篇

Q235钢在假单胞菌和铁细菌混合作用下的腐蚀行为

段冶, 李松梅, 杜娟, 刘建华   

  1. 北京航空航天大学材料科学与工程学院, 空天材料与服役教育部重点实验室, 北京100191
  • 收稿日期:2010-06-24 修回日期:2010-09-20 发布日期:2010-12-01
  • 通讯作者: 李松梅 E-mail:songmei_li@buaa.edu.cn

Corrosion Behavior of Q235 Steel in the Presence of Pseudomonas and Iron Bacteria

DUAN Ye, LI Song-Mei, DU Juan, LIU Jian-Hua   

  1. Key Laboratory of Aerospace Materials and Performance, Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China
  • Received:2010-06-24 Revised:2010-09-20 Published:2010-12-01
  • Contact: LI Song-Mei E-mail:songmei_li@buaa.edu.cn

摘要:

采用腐蚀失重法、电化学阻抗谱(EIS)和表面分析技术研究了Q235钢在假单胞菌和铁细菌共同作用下的腐蚀行为. 结果表明: 与单种菌相比, 两种菌混合作用下Q235钢腐蚀受到了抑制. 混菌体系中金属电极自腐蚀电位升高, 腐蚀电流密度减小, 交流阻抗值随时间增大. 扫描电子显微镜(SEM)分析结果表明混合菌体系中Q235钢表面形成了均匀致密的腐蚀产物膜.

关键词: 微生物腐蚀, 假单胞菌, 铁细菌, 电化学阻抗谱, 极化曲线

Abstract:

The microbiologically influenced corrosion and electrochemical behavior of Q235 steel were investigated in the presence of pseudomonas and iron bacteria using the weight loss method, electrochemical impedance spectroscopy (EIS), and surface analysis method. The results showed that the corrosion of Q235 steel was evidently prohibited in the presence of the two bacterial species. Q235 steel immersed in a mixed culture containing both pseudomonas and iron bacteria showed higher free corrosion potential, lower corrosion current density, and an increase in impedance with immersion time. Scanning electron microscopy (SEM) revealed that a significant corrosion product film formed on the surface of Q235 steel with superior homogeneity and compactness.

Key words: Microbiologically influenced corrosion, Pseudomonas, Iron bacteria, Electrochemical impedance spectroscopy, Polarization curve

MSC2000: 

  • O646