Muthukumar, N. and Maruthamuthu, S. and Palaniswamy, N. (2006) Water-soluble inhibitor on microbiologically influenced corrosion in diesel pipeline. Colloids and Surfaces B: Biointerfaces , 53 (2). pp. 260-270. ISSN 0927-7765

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Abstract

The effect of water-soluble corrosion inhibitor on the growth of bacteria and its corrosion inhibition efficiency were investigated. Corrosion inhibition efficiency was studied by rotating cage test and flow loop techniques. The nature of biodegradation of corrosion inhibitor was also analyzed by using Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (NMR) and Gas chromatography and mass spectrometer (GC–MS). The bacterial isolates (Serratia marcescens ACE2, Bacillus cereus ACE4) have the capacity to degrade the aromatic and aliphatic hydrocarbon present in the corrosion inhibitor. The degraded products of corrosion inhibitor and bacterial activity determine the electrochemical behaviour of API 5LX steel. The influence of bacterial activity on degradation of corrosion inhibitor and its influence on corrosion of API 5LX have been evaluated by employing weight loss techniques and electrochemical studies. The main finding of this paper is that the water-soluble corrosion inhibitor is consumed by the microbial action, which contributes to the decrease in inhibitor efficiency. The present study also emphasis the importance of evaluation of water-soluble corrosion inhibitor in stagnant model (flow loop test) and discusses the demerits of the water-soluble corrosion inhibitors in petroleum product pipeline.

Item Type:	Article
Uncontrolled Keywords:	Diesel pipeline; Water-soluble corrosion inhibitor; Rotating cage; Flow loop method; Biodegradation; Microbiologically influenced corrosion
Subjects:	Corrosion Protection Corrosion Science and Engineering
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	06 Apr 2012 15:29
Last Modified:	06 Apr 2012 15:29
URI:	http://cecri.csircentral.net/id/eprint/575

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