Hexamine as corrosion inhibitor for zinc in hydrochloric acid | Abstract

Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry

ISSN: 0975-413X
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Hexamine as corrosion inhibitor for zinc in hydrochloric acid

Author(s): R. T. Vashi and Krunal Desai

The corrosion of zinc in hydrochloric acid containing hexamine has been studied at different acid concentrations, inhibitor concentration and temperatures. Corrosion increases with the increase of acid concentration . Inhibition efficiency (I.E.) of hexamine increases with the concentration of inhibitor and decreases with the increase in concentration of acid. As temperature increases, corrosion rate increases while percentage of I.E. decreases. The plot of log (θ/1-θ) versus log C results in a straight line suggest that the inhibitor cover both the anodic and cathodic regions through general adsorption following Langmuir isotherm. Galvenostatic polarization curves show polarization of both anode as well as cathode


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