Effect of Methyl, Ethyl, and Propyl Substitution on Benzimidazole for the Protection of Copper Metal in Nitric Acid: Theoretical and Electrochemical Screening Studies

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• 作者：Revathi Mohan ; K. K. Anupama ; Abraham Joseph
• 关键词：Copper ; Acid solutions ; EIS ; Polarization ; Acid inhibition
• 刊名：Journal of Bio- and Tribo-Corrosion
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：3
• 期：1
• 全文大小：2,391 KB
• 刊物类别：Tribology, Corrosion and Coatings; Continuum Mechanics and Mechanics of Materials; Biomaterials;
• 刊物主题：Tribology, Corrosion and Coatings; Continuum Mechanics and Mechanics of Materials; Biomaterials;
• 出版者：Springer International Publishing
• ISSN：2198-4239
• 卷排序：3

文摘

The interaction and corrosion protection properties of 2-methylbenzimidazole, 2-ethylbenzimidazole, and 2-propylbenzimidazole on copper in nitric acid at different temperatures have been studied by polarization, EIS, and adsorption studies. Experimental studies show that better inhibition efficiency is exhibited by 2-MBI but theoretical calculations of the inhibitor molecules suggests maximum inhibition efficiency for 2-EBI and 2-PBI. This may be attributed to the presence of increased steric hindrance in 2-EBI and 2-PBI which affect on the rate and efficiency of adsorption. The adsorption of inhibitor molecules on the metal surface obeys Langmuir isotherm.