Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry
ISSN: 0975-413X
Abstract
Hexamine as corrosion inhibitor for zinc in (HNO3 + H2SO4) binary acid mixture
Author(s): R. T. Vashi, H. M. Bhajiwala and S. A. DesaiThe corrosion of zinc in (HNO3+ H2SO4) acid mixture containing hexamine as inhibitor has been studied at different mix acid concentration, inhibitor concentration and temperatures. Corrosion increases with the concentration of acid and with the temperature. The inhibition efficiency (I.E.) of hexamine increases with the concentration of inhibitor. The I.E. 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 inhibitor cover both the anodic and cathodic regions through general adsorption following Langmuir isotherm. Galvenostatic polarization curves show anodic polarization.
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