腐蚀
硫杆菌
介电谱
材料科学
生物膜
扫描电子显微镜
吸附
金属
冶金
电化学
化学工程
核化学
复合材料
化学
细菌
电极
硫黄
有机化学
物理化学
生物
工程类
遗传学
作者
Songmei Li,Yuanyuan Zhang,Jianhua Liu,Mei Yu
出处
期刊:International Journal of Modern Physics B
[World Scientific]
日期:2010-06-30
卷期号:24 (15n16): 3083-3088
被引量:4
标识
DOI:10.1142/s0217979210066124
摘要
Electrochemical measurement and surface analysis methods were employed to investigate the Microbiologically Influenced Corrosion (MIC) influenced by Thiobacillus ferrooxidans biofilm. Electrochemical impedance spectroscopy (EIS) results indicated that the impedance value of steel A3 after 21 days of immersion in sterile solution was much higher than that of T.f solution. Atomic Force Microscopy (AFM) results showed the adsorption state of the microorganism on the metal surface for 7 days of exposure in T.f solution. The morphologies of the surface film were analyzed with the Scanning Electron Microscope (SEM), which showed the changes with exposure time of the film on the metal surface. The special morphology and the heterogeneity of Thiobacillus ferrooxidans biofilm induced the localized corrosion of steel A3. After 21 days of exposure, general corrosion occurred in the sterile solution, while localized corrosion was detected under the effect of Thiobacillus ferrooxidans.
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