An electrochemical investigation of azole derivative on aluminum in 0.25 M HCl solution using EN and EIS techniques

Abstract

PurposeThis study attempts to investigate corrosion inhibition properties of 1H-benzimidazole (B) and 1H-benzotriazole (BTA) on aluminum in 0.25 M HCl solution at different concentrations.Design/methodology/approachTo this end, electrochemical techniques including electrochemical noise (EN), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization were used.FindingsResults showed a greater corrosion inhibition efficiency of BTA than B on aluminum in HCl solution. BTA showed greater tendency to adsorption on the metal surface than B because of the inclusion of three nitrogen atoms.Originality/valueThe novelty of this work is comparing EN data with EIS and potentiodynamic polarization parameters.