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4-Aminoantipyrine as corrosion inhibitor for zinc in phosphoric acid. | Abstract

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

ISSN: 0975-413X

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Abstract

4-Aminoantipyrine as corrosion inhibitor for zinc in phosphoric acid.

Author(s): R. T. Vashi and Diksha Naik

The 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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