Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry
ISSN: 0975-413X
Abstract
4-Aminoantipyrine as corrosion inhibitor for zinc in phosphoric acid.
Author(s): R. T. Vashi and Diksha NaikThe corrosion of zinc in phosphoric acid containing 4-aminoantipyrine has been studied at different acid concentrations, inhibitor concentration and temperatures. Corrosion increases with the concentration of acid and the temperature. Inhibition efficiency (I.E.) of 4-aminoantipyrine increases with the concentration of inhibitor and decreases with the increase in concentration of acid. As temperature increases, percentage of inhibition decreases. The plot of log (θ/1-θ) versus log C results in a straight line suggest that the inhibitors cover both the anodic and cathodic regions through general adsorption following Longmuir isotherm. Galvenostatic polarization curves show polarization of both anode as well as cathode.
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