Corrosion Inhibition in HCl Using Methyl Pyridines

Abstract

The inhibiting effect of pyridine and seven of its methyl derivatives on the corrosion of iron in O2-free, 6.08N HC1 at 35~ was determined. Corrosion rates were measured by colorimetric analysis for iron with mercaptoacetic acid. The relative inhibitor efficiency and cathodic potential shift increased with increasing inhibitor concentration and, for a given concentration, with increasing electron density at the nitrogen atom. Both increased slightly with decreasing HC1 concentration, but a temperature increase of 10~ had no effect on either. The proposition that chemisorption is involved in Corrosion inhibition is supported by these experiments. As a supplementary item the great importance of careful purification of the organic compounds used in such researches as this is documented.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.114.34.22 Downloaded on 2014-12-01 to IP

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