物理化学学报 >> 2008, Vol. 24 >> Issue (09): 1553-1557.doi: 10.1016/S1872-1508(08)60063-7

研究论文 上一篇    下一篇

氧化亚铁硫杆菌作用下A3钢的腐蚀行为

李松梅, 张媛媛, 刘建华, 于美   

  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:2008-04-21 修回日期:2008-05-26 发布日期:2008-09-10
  • 通讯作者: 李松梅 E-mail:songmei_li@buaa.edu.cn

Corrosion Behavior of Steel A3 Influenced by Thiobacillus Ferrooxidans

LI Song-Mei, ZHANG Yuan-Yuan, LIU Jian-Hua, YU Mei   

  1. School of Materials Science and Engineering, Beihang University, Beijing 100083, P. R. China
  • Received:2008-04-21 Revised:2008-05-26 Published:2008-09-10
  • Contact: LI Song-Mei E-mail:songmei_li@buaa.edu.cn

摘要: 采用微生物学方法、电化学方法和表面分析技术研究了A3钢在氧化亚铁硫杆菌中的腐蚀特征和生物膜形貌, 分析了微生物的存在对A3钢电化学行为的影响. 极化曲线测试结果表明, 细菌的存在使浸泡20天后A3钢电极的自腐蚀电位升高, 腐蚀电流密度增大. 原子力显微镜测试结果表明, 浸泡7天的A3钢表面生物膜分布不均匀, 从而引发点蚀萌生. 由于细菌的代谢作用以及A3钢表面腐蚀产物与生物膜的特殊形貌特征, 浸泡在菌液中7天后的A3钢表面有点蚀出现; 随着时间的延长, A3钢表面的点蚀坑深度增大且数量增多, 氧化亚铁硫杆菌的存在使A3钢的局部腐蚀程度加剧.

关键词: 氧化亚铁硫杆菌, 钢, 腐蚀

Abstract: The electrochemical measurement and surface analysis methods were employed to investigate the corrosion behavior of steel A3 influenced by Thiobacillus ferrooxidans (T.f). Polarization curve results indicated that the presence of Thiobacillus ferrooxidans resulted in higher corrosion potential of the electrode and obviously accelerated the corrosion current density. Atomic force microscope (AFM) results showed that asymmetric biofilms adhered to the surface of steel A3 after 7 days of exposure. The scanning electronic microscopy (SEM) results showed that pitting appeared on the surface of steel A3 after 7 days of exposure in T.f solution, which was induced by the metabolismof bacteria and the morphology of the deposit. Pitting holes of steel A3 in T.f solution were deeper after 20 days of exposure, the presence of Thiobacillus ferrooxidans aggravated the localized corrosion of A3 steel.

Key words: Thiobacillus ferrooxidans, Steel, Corrosion

MSC2000: 

  • O646