文章基本信息

标题：Understanding the adsorption of benzimidazole derivative as corrosion inhibitor for carbon steel in 1 M HCl: Experimental and theoretical studies,
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作者：El Aoufir Y. ; El Aoufir Y. ; El Bakri Y. 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2017
卷号：8
期号：9
页码：3290-3302
出版社：University of Mohammed Premier Oujda
摘要：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.
关键词：Carbon steel ; Hydrochloric acid; Corrosion inhibition ; Benzimidazole derivative; Electrochemical;techniques ; DFT