A new inhibitor for mild carbon steel:: Electrochemical and DFT studies

被引：141

作者：

Cruz, J ^{[1
]}

Pandiyan, T ^{[1
]}

García-Ochoa, E ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2005年 / 583卷 / 01期

关键词：

corrosion inhibitor; benzimidazoles; EIS; DFT calculations;

D O I：

10.1016/j.jelechem.2005.02.026

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The anti-corrosive properties of 2-aminomethylbenzimidazole (AMB) and bis(benzimidazol-2-ylethyl)sulfide (BBES) were analyzed by electrochemical techniques such as polarization curves and electrochemical impedance spectroscopy (EIS). The results show that AMB behaves as a cathodic inhibitor, while BBES functions as mixture inhibitor. Furthermore, BBES inhibits the corrosive process more strongly than AMB; because in the former benzimidazoles and thioether sulfur work as active sites for the adsorption process over the metal surfaces. This observation is supported by density functional theoretical (DFT) parameters such as frontier molecular orbitals (HOMO and LUMO), Mulliken charges and the electrostatic potential map. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：8 / 16

页数：9

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