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Paper Details

Inhibition Effect of Imidazole on Mild Steel in Binary Acid Mixture of (HNO3+HCl)

K. B. Patel* and H. K. Kadiya1

Journal Title:Journal of Chemical, Biological and physical sciences
Abstract


The corrosion inhibition of Imidazole on Mild Steel in (HNO3 +HCl) binary acid mixture was studied by weight loss, Temperature effect methods and polarization techniques. Corrosion rate increases with increase in concentration of mix acid. The inhibition efficiency of Imidazole increased as the concentration of Imidazole Increased. The inhibitor is found to be an excellent corrosion inhibitor from the results obtained. The adsorption of inhibitor on Mild Steel surface has been found to obey Langmuir adsorption isotherm. The inhibition action depends on the chemical structure, concentration of the inhibitor and concentration of the corrosive medium. The values of activation energy (Ea), free energy of activation (?Gads), Heat of adsorption (Qads), enthalpy of adsorption (?H0ads) and entropy of adsorption (?S0ads) were calculated. Corrosion rate increases while I. E. decreases with rise in temperature.The corrosion inhibition of Imidazole on Mild Steel in (HNO3 +HCl) binary acid mixture was studied by weight loss, Temperature effect methods and polarization techniques. Corrosion rate increases with increase in concentration of mix acid. The inhibition efficiency of Imidazole increased as the concentration of Imidazole Increased. The inhibitor is found to be an excellent corrosion inhibitor from the results obtained. The adsorption of inhibitor on Mild Steel surface has been found to obey Langmuir adsorption isotherm. The inhibition action depends on the chemical structure, concentration of the inhibitor and concentration of the corrosive medium. The values of activation energy (Ea), free energy of activation (?Gads), Heat of adsorption (Qads), enthalpy of adsorption (?H0ads) and entropy of adsorption (?S0ads) were calculated. Corrosion rate increases while I. E. decreases with rise in temperature.

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