Anandakumar, B. and Cho, J.H. and Venkatachari, G. and Maruthamuthu, S. (2009) Molecular characterization and corrosion behavior of thermophilic (55 8C) SRB Desulfotomaculum kuznetsovii isolated from cooling tower in petroleum refinery. Materials and Corrosion, 60 (9). pp. 730-737.

PDF Restricted to Registered users only Download (389Kb) | Request a copy

Abstract

Desulfotomaculum kuznetsovii (D. kuznetsovii), a thermophilic sulfate-reducing bacterium (SRB), was identified in a cooling tower of a petroleum refinery by 16S rRNA gene sequencing and its functional gene encoding dissimilatory sulfite reductase (dsrAB). The thermophilic sulfate-reducing bacterial species have been reported for the first time in the cooling towers of an Indian petroleum refinery. The protein coded by dsrAB gene was cloned, expressed, and identified using recombinant DNA technology. Weight loss method, electrochemical and surface analysis showed the corrosion behavior of the isolate. In the presence of D. kuznetsovii, the corrosion rate was higher when compared to control at 55 8C. It suppresses the anodic reaction and enhances the cathodic reaction by the production of organic complex and iron sulfide, respectively. Numerous pitting were noticed on mild steel which is due to the presence of D. kuznetsovii and its role in the corrosion process has been discussed.

Item Type:	Article
Subjects:	Corrosion Science and Engineering
Divisions:	UNSPECIFIED
Depositing User:	TTBD CECRI
Date Deposited:	08 Apr 2012 14:40
Last Modified:	08 Apr 2012 14:40
URI:	http://cecri.csircentral.net/id/eprint/677

Actions (login required)

View Item