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A Comparative Study on Sulfate Reducing Bacteria Influenced Corrosion of Copper Alloys |
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北京交通大学市政环境工程系 |
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Abstract The growth characterization for sulfate reducing bacteria (SRB) under anaerobic condition was studied. Measurements of corrosion potential and the polarization resistance were used to investigate the electrochemical behavior of HSn-70-1AB and BFe30-1-1copper alloys in medium containing sulfate reducing bacteria. The results shows that the biological corrosion of copper alloys is closely related to growth characterization of SRB. The corrosion potential and the polarization resistance of electrode for copper alloys drastically moved toward negative direction as the SRB was in the logarithm growth stage. While both of them would slowly drop down as SRB entered into stable growth stage. Scanning electron Microscopy and X-ray diffraction were respectively used to analyze the morphology and chemical composition of the biofilm. The results showed that biofilm characterization formed on the copper alloys were totally different.
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Received: 24 April 2006
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