Anandkumar, B. and Rajasekar, A. and Venkatachari, G. and Maruthamuthu, S. (2009) Effect of thermophilic sulphate-reducing bacteria (Desulfotomaculum geothermicum) isolated from Indian petroleum refinery on the corrosion of mild steel. Current Science, 97 (3). pp. 342-348.

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Abstract

The role of thermophilic sulphate-reducing bacteria (SRB) Desulfotomaculum geothermicum in mild steel corrosion was evaluated by electrochemical study and surface analysis technique. In the presence of D. geothermicum, the corrosion rate was 0.0698 mmpy at 50°C, which was higher when compared to control. Polarization study revealed that the bacteria enhanced cathodic reaction and suppressed anodic reaction. XRD data revealed that the presence of FeS enhanced the cathodic reaction by the formation of a protective film on the metal surface. Pitting was observed by confocal microscopy, which may be due to cathodic depolarization. The study implicates the importance of D. geothermicum in the corrosion of cooling towers of the petroleum refinery.

Item Type:	Article
Uncontrolled Keywords:	Biocorrosion; mild steel corrosion; petroleum refinery; sulphate reducing bacteria.
Subjects:	Corrosion Science and Engineering
Divisions:	UNSPECIFIED
Depositing User:	TTBD CECRI
Date Deposited:	20 Jan 2012 03:40
Last Modified:	20 Jan 2012 03:40
URI:	http://cecri.csircentral.net/id/eprint/318

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