Corrosion Inhibition and Adsorption Properties of 2-Methyl Imidazole on Mild Steel in Binary Acid Mixture of (HNO3+HCl)

Author(s)

Patel, K. B., Kadiya, H. K.

Author's Affiliation

Abstract

The corrosion inhibition of 2-Methyl imidazole on Mild Steel in (HNO₃ +HCl) binary acid mixture was studied by weight loss method, Temperature effect method and polarization techniques. Corrosion rate increases with increase in concentration of mix acid. The inhibition efficiency of 2-Methyl imidazole increased as the concentration of 2-Methyl 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 (ΔG°ads), Heat of adsorption (Qads), enthalpy of adsorption (ΔH⁰ads) and entropy of adsorption (ΔS⁰ads) were calculated. Corrosion rate increases while I. E. decreases with rise in temperature. Potentiostatic polarization results revealed that Imidazole act as mixed typed inhibitors.

Keywords

Corrosion, Mild Steel, Nitric and Hydrochloric acid mixture, 2-Methyl imidazole

Cite This Article

Patel, K. B., & Kadiya, H. K. (2013). Corrosion Inhibition and Adsorption Properties of 2-Methyl Imidazole on Mild Steel in Binary Acid Mixture of (HNO3+HCl). International Journal for Pharmaceutical Research Scholars (IJPRS), 2(4), 193-197.