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AFM STUDY OF MICROBIOLOGICALLY INFLUENCED CORROSION OF COPPER ALLOYS |
DU Yili1; LI Jin1; GE Xiaopeng2; YUAN Weishuang1 |
1. Department of Municipal and Environmental Engineering; Beijing Jiaotong University; Beijing 100044
2. Research Center for Eco-Environmental Science; Chinese Academy of Sciences; Beijing 100085 |
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Abstract Atomic force microscopy (AFM) was applied to investigate the microbiologically influenced corrosion of copper alloys immerged in the sulfate reducing bacteria (SRB) inoculated culture medium. Three types of copper alloys were studied, which are HSn70-1A, HSn70-1B and HSn70-1AB. Biofilms formed on the surface of these copper alloys were different. The measurements of surface roughness indicated an asymmetrical structure of the biofilm, and HSn70-1AB has maximal surface roughness. Furthermore, the roughness of HSn70-1A is higher than HSn70-1B. Following the removal of biofilms,increase of roughness indicated the deterioration of copper alloys results from microbiologically influenced corrosion (MIC). The capability of the AFM to produce quantitative information in the study of MIC was confirmed.
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Received: 12 February 2007
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Corresponding Authors:
DU Yili
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