The inhibition performance of 5-methoxy-2-[(4-methoxy-3,5-dimethyl-pyridin-2-yl)methylsulfinyl]benzimidazole (MSB) on the corrosion of carbon steel in 1M HCl was investigated using electrochemical impedance spectroscopy (EIS) and potentiodynamic measurements at various concentrations. It was found that tested compound has high inhibitory efficiency against the corrosion of carbon steel in HCl solution. The inhibition efficiency increases with concentration and decreases a little with the rises of the temperature from 303 to 333 K. Results showed that MSB shows maximum inhibition efficiency of 95% at 10-3 M concentration. This compound is classified as the mixed type corrosion inhibitor with predominant control of cathodic reaction. The adsorption of benzimidazole derivative on the surface of carbon steel obeyed the isotherm of Langmuir adsorption. Quantum chemical calculations were employed to give further insight into the mechanism of inhibition action of MSB.

Title

Journal of Materials and Environmental Science

Publisher

University of Mohammed 1er Oujda Morocco

Publisher Country

Morocco

Publication Type

Prtinted only

Volume

8

Year

2017

Pages

13