Subramania, A. and Kalyanasundaram, N.T. and Sathiyapriya, R. and Saminathan, S. (2004) Aldimines – effective corrosion inhibitors for mild steel in hydrochloric acid solution. Journal of Applied Electrochemistry, 34 (7). pp. 693-696. ISSN 0021-891X

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Abstract

New and effective aldimine types of corrosion inhibitors namely, N-methylidene octylamine (MOA), N-ethylidene octylamine (EOA) and N-propylidene octylamine (POA) have been synthesized. Their inhibition efficiency was investigated for the corrosion of mild steel in 1 M HCl solution by various corrosion monitoring techniques. A preliminary screening of the inhibition efficiency of the inhibitors was carried out by weight loss and gasometric studies. They were found to behave as good inhibitors in 1 M HCl solution. Potentiodynamic polarization measurements show that aldimines are mixed type inhibitors. The extent of the decrease in the hydrogen permeation current through the mild steel surface was studied by the hydrogen permeation technique and it was found that the decrease was in the order POA > EOA > MOA. Double layer capacitance and charge transfer resistance values were derived from Nyquist plots obtained from AC impedance studies. The adsorption of these compounds on mild steel from 1 M HCl solution obeys the Temkin adsorption isotherm.

Item Type:	Article
Uncontrolled Keywords:	aldimines; corrosion inhibitors; hydrogen permeation; polarization methods; temkin adsorption isotherm
Subjects:	Corrosion Science and Engineering
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	27 Feb 2012 12:14
Last Modified:	27 Feb 2012 12:14
URI:	http://cecri.csircentral.net/id/eprint/951

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