Corrosion inhibition of Al-Mg alloy by gentisic acid

Gentisic acid was studied for possible use as an Al-2.5Mg alloy corrosion inhibitor in a 0.5 mol dm(-3) NaCl solution. Investigations were performed on a rotating disc electrode in a quiescent solution at different electrode rotation rates and electrolyte temperatures. The results indicate that, the...

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Published inIndian journal of chemical technology Vol. 17; no. 2; pp. 89 - 94
Main Authors Vrsalovid, L, Kliskic, M, Gudic, S, Smoljko, I
Format Journal Article
LanguageEnglish
Published 01.03.2010
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Summary:Gentisic acid was studied for possible use as an Al-2.5Mg alloy corrosion inhibitor in a 0.5 mol dm(-3) NaCl solution. Investigations were performed on a rotating disc electrode in a quiescent solution at different electrode rotation rates and electrolyte temperatures. The results indicate that, the addition of gentisic acid inhibits corrosion of Al-2.5Mg alloy, and the inhibition efficiency increases with increasing inhibitor concentration but decreases with increasing electrode rotation rate and electrolyte temperature. The investigated compound acts as a cathodic-type inhibitor and the inhibition is ascribed to the adsorption of the inhibitor onto the electrode surface. The adsorptive behaviour of gentisic acid follows the Freundlich adsorption isotherm.
Bibliography:ObjectType-Article-2
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ISSN:0971-457X