Investigation of gliclazide drug as novel corrosion inhibitor for mild steel in 1 M HCl solution

Abstract

Inhibition performance of Gliclazide as corrosion inhibitor for mild steel (MS) in 1 M HCl solution was studied by weight loss measurements and electrochemical tests. It showed 91% inhibition efficiency at 400 ppm concentration. Polarization study indicates that Gliclazide behaves as mixed type inhibitor. The adsorption of Gliclazide on mild steel surface follows Langmuir adsorption isotherm. The values of free energy of adsorption (ΔG°ads) indicate that adsorption of Gliclazide is a spontaneous process and it involves both physical and chemisorption. © 2012 by ESG.