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| Effects of Medium flow characteristic and Material Surface Appearance on Corrosion Behavior of HSn70-1A Alloy under Biofilm of SRB |
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| 北京交通大学土木建筑工程学院04硕3班 |
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Cite this article:
;. Effects of Medium flow characteristic and Material Surface Appearance on Corrosion Behavior of HSn70-1A Alloy under Biofilm of SRB. J Chin Soc Corr Pro, 2008, 28(1): 38-43 .
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Abstract The effect of sulfate-reducing bacteria (SRB) on corrosion behavior of HSn70-1A alloy were studied by electrochemical, microbiology and surface analysis methods. The results showed that the free corrosion poten?鄄tial of the alloy shifted negatively when SRB was inoculated,the polarization resistance decreased obviously, which corresponds to an increased corrosion rate. The serious pitting corrosion occurring on the alloy surface un?鄄der the action of SRB was observed by SEM. Furthermore, influence of medium flow characteristic and material surface appearance on corrosion behavior of HSn70－1A alloy under the biofilm of SRB were researched. It was showed that the average corrosion rate was higher and the SRB count in the biofilm was less when test piece was immersed in the flowing batch culture medium inoculated with SRB than in the static batch culture medium in?鄄oculated with SRB . Thus the flow of medium could speed up the corrosion rate . After being coated in the mix?鄄ture corrosion inhibitor of MBT and BTA beforehand, the copper electrode had more positive free corrosion po?鄄tential and higher linear polarization resistance in the culture medium inoculated with SRB than the one without being coated, which demonstrated that the resistance of HSn70－1A alloy against microbiologically influenced cor?鄄rosion increased obviously.
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Received: 02 June 2006
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