Sridharan, D. and Karthikeyan, C. and Maruthan, K. and Manoharan, SP. and Palaniswamy, N. (2013) Impact of Mixed Inhibitor on Electrochemical Behavior of Inland Water Biofilm Formed on 316L Stainless Steel. Industrial and Engineering Chemistry Research, 52. pp. 16175-16181. ISSN 0888-5885

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Abstract

The electrochemical behavior of biofilm on AISI 316L stainless steel was studied in the mixed inhibitor system: amino trimethylene phosphonic acid with zinc sulfate (ATMP + Zn2+) added inland water system. The natural biofilm shifts potential toward positive side, about 380 mV vs SCE and in the presence of inhibitor, the biofilm does not shift the potential toward positive side. Cathodic polorization and cyclic voltammogram explained the presence of manganese oxide and peroxide in the natural biofilm. There were no oxidation and reduction peak in the inhibitor treated (industrial) biofilm because of removal of cations in the biofilm by inhibitor. The natural biofilm has thick matrix with extracellular polysaccharides (EPS) on 316L SS. In the presence of inhibitor in the water, distinct rod shaped cells were noticed without any EPS. The inhibitor added system showed the lowest passive current (ip) and high resistance (Rct) when compared to the natural biofilm

Item Type:	Article
Uncontrolled Keywords:	biofilm; stainless steel; inhibitors
Subjects:	Biocorrosion Corrosion Protection
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	05 Jan 2015 05:02
Last Modified:	05 Jan 2015 05:02
URI:	http://cecri.csircentral.net/id/eprint/3116

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