Veratraldehyde as Corrosion Inhibitor for Zinc in Different Acid Medium

摘要

The corrosion inhibition of zinc in 0.1 M HCl and 0.05 M H2SO4 was studied separately by using Veratraldehyde as a corrosion inhibitor. Mass loss and electrochemical studies were part of the investigations. The Inhibition efficiencies were evaluated at different concentrations of the inhibitor at different temperature. The inhibition efficiency increased with increase in inhibitor concentration and decreased with increase in temperature in both the medium. The inhibitor was more active in HCl than in H2SO4. The maximum inhibition efficiency approached at 1000 ppm in both HCl and H2SO4 medium. Electrochemical studies show that inhibitor acts a mixed type inhibitor. The inhibitor was found to adsorb on the zinc surface according to the Langmuir adsorption isotherm.