Maruthamuthu, S. and Ponmariappan, S. and Mohanan, S. and Palaniswamy, N. and Palaniappan, R. and Rengaswamy, N.S. (2003) Control of metallic corrosion through microbiological route. Indian Journal of Experimental Biology, 41 (09). pp. 1023-1029. ISSN 0019-5189

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Involvement of biofilm or microorganisms in corrosion process is widely acknowledged. Although majority of the studies on microbiologically induced corrosion (MIC) have concentrated on aerobic/anaerobic bacteria. There are numerous aerobic bacteria, which could hinder the corrosion process. The microbiologically produced exopolymers provide the structural frame work for the biofilm. These polymers combine with dissolved metal ions and form organometallic complexes. Generally heterotrophic bacteria contribute to three major processes: (i) synthesis of polymers (ii) accumulation of reserve materials like poly-b-hydroxy butrate (iii) production of high molecular weight extracellular polysaccharides. Poly-b-hydroxy butrate is a polymer of D(-)b-hydroxy butrate and has a molecular weight between 60000 and 250000. Some extracellular polymers also have higher molecular weights. It seems that higher molecular weight polymer act as biocoating. In the present review, role of biochemistry on corrosion inhibition and possibilities of corrosion inhibition by various microbes are discussed. The role of bacteria on current demand during cathodic protection is also debated. In addition, some of the significant contributions made by CECRI in this promising area are highlighted

Item Type: Article
Uncontrolled Keywords: Biofilm; Corrosion control; Heterotrophic bacteria; Metallic corrosion
Subjects: Corrosion Science and Engineering
Depositing User: ttbdu cecri
Date Deposited: 04 May 2012 11:22
Last Modified: 04 May 2012 11:22

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