北京航空航天大学学报 ›› 2004, Vol. 30 ›› Issue (10): 1013-1016.

• 论文 • 上一篇    下一篇

硫酸盐还原菌对LY6腐蚀电化学行为的影响

李松梅, 刘建华, 梁馨, 贾小丽   

  1. 北京航空航天大学 材料科学与工程学院 北京 100083
  • 收稿日期:2004-04-28 发布日期:2010-09-24
  • 作者简介:李松梅(1964-),女,黑龙江齐齐哈尔人,副教授,songmei li@buaa.edu.cn.

Effect of sulfate-reduced bacteria on corrosion and electrochemical behaviors of LY6 Al alloy

Li Songmei, Liu Jianhua, Liang Xin, Jia Xiaoli   

  1. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2004-04-28 Published:2010-09-24

摘要: 用开路电位法,动电位扫描极化法和电化学交流阻抗频谱法(EIS)研究了LY6在不含硫酸盐还原菌(SRB)的无菌溶液和含SRB的有菌溶液中的电化学行为.结果表明SRB加速了LY6的腐蚀,且动态挂片的腐蚀速率大于静态挂片的腐蚀速率,铝合金开路电位随试验时间的增加而负移,有菌溶液中负移0.26V(SCE),无菌溶液中负移0.16V(SCE).从阳极极化曲线上观察到表观点蚀电位范围为-0.6~0.2V(SCE).电化学阻抗谱表明随着菌液培养时间的增加,极化电阻减小.

Abstract: The open circuit potential, potentiodynamic scanning polarization and electrochemical impedance spectroscopy (EIS) were employed to analyze the corrosion behaviors of LY6 Al alloy in solutions with and without sulfate reduced bacteria(SRB).It was showed that SRB accelerated the corrosion rate of LY6 Al alloy, and the corrosion rate of dynamic test sample was larger than that of static test sample. The open circuit potential shifted negatively with the time. The shifted values were 0.26V(SCE)and 0.16V (SCE) in solution with and without SRB,respectively. The range of apparent pitting potential obtained from anodic polarization was -0.6~0.2V(SCE). It was found that polarization resistance decreased with the time based on EIS results.

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