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.
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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2010年第12期3203-3211,共9页
Acta Physico-Chimica Sinica
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
Microbiologically influenced corrosion
Pseudomonas
Iron bacteria
Electrochemical impedance spectroscopy
Polarization curve
作者简介
Corresponding author. Email: songmei_li@buaa.edu.cn; Tel: +86-10-82317103