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Journal of the Indian Chemical Society
Volume 98 (6), 2021, 100083

Metal corrosion induced by microbial activity Mechanism and control options

S. Noyel Victoria, Akansha Sharma, R.Manivannan

Department of Chemical Engineering, National Institute of Technology Raipur, Chhattisgarh 492010, India.


Microbe-influenced material damage is the result of contributions from different types of microbes and their physiological activity. This fact makes the understanding of microbial corrosion very difficult. Another interesting fact is that the biofilms formed by the bacterial action inhibit or promote the biocorrosion of metals depending on the local environmental conditions. A slight change in the living conditions such as nutrient composition, oxygen concentration, light, and temperature can alter the behavior of the microbial population from non-corrosive to aggressively corroding. The metabolic activity of certain bacterial strains and the biofilm produced by them helps to control biocorrosion. The use of bioengineered bacterial strains has also been found to offer promising results in biocorrosion control. The most widely practiced biocorrosion mitigation practices include the application of protective coatings and the use of biocides. Recently, incorporating the corrosion protective functional layers on the metal surface via polymerization reactions has gained importance. This review provides information on the type of microorganisms causing the biocorrosion, their mechanism of action, and the factors that influence the corrosion rate. The development and involvement of the biofilm in corrosion have also been discussed in detail. The techniques available for the control of biocorrosion have also been explored.

Keywords: Biocorrosion, Biofilm, Sulfate-reducing bacteria, Inhibitor, Outline.

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