Evaluation of the Inhibitive Effect of Schiff Base on the Acid Corrosion of Mild Steel

Abstract

            Schiff base N-[(2-chloroquinolin-3-yl)methylidene]-2-methylaniline was synthesized, and the inhibitive effect for mild steel in 1M HCl solution was investigated by weight loss measurement, electrochemical tests and scanning electronic microscopy(SEM). From the weight loss measurements and electrochemical tests, it was observed that the inhibition efficiency increases with the increase in the Schiff base concentration and reaches maximum  at the optimum concentration.  This is further confirmed by the decrease in the corrosion rate. It is found that the system follows Langmuir adsorption isotherm.