Maruthamuthu, S. and Muthukumar, N. and Natesan, M. and Palaniswamy, N. (2008) Role of air microbes on atmospheric corrosion. Current Science, 94 (3). pp. 359-363.

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Microorganisms enhance deterioration of materials of construction. In the present study, the influence of air microbes on existing concrete pile and on mild steel coupons is reported. Pseudomonas sp., Bacillus sp., Micrococcus sp., Moraxella sp., Anthrobacter sp., Streptococcus sp., Staphylococcus sp. and Acinetobacter sp. were identified on the concrete pile. The growth and distribution of bacteria was due to the presence of humidity and SO2 in the atmosphere of the industrial area, leading to the proliferation of microbes on the materials under study. Corrosion rate of mild steel in polluted site was found to be 0.116 mmpy, whereas in an unpolluted site it was only 0.021 mmpy. The higher rate was due to the simultaneous action of pollutants and air microbes on corrosion of materials. The study shows that the atmospheric corrosion of materials in polluted environment was due to significant contribution of the combined action of heterotrophic bacteria, iron bacteria, manganese oxidizing bacteria and thiobacilli.

Item Type: Article
Uncontrolled Keywords: Atmospheric corrosion; bacteria; mild steel; polluted environment
Subjects: Corrosion Protection
Corrosion Science and Engineering
Depositing User: ttbdu cecri
Date Deposited: 16 Jan 2012 09:58
Last Modified: 16 Jan 2012 09:58

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