Determination of inhibition effects of various imidazole derivatives on copper corrosion in 0.1M HCl media

被引：13

作者：

Bereket, G. ^{[1
]}

Pakdil, S. ^{[1
]}

Oegretir, C. ^{[1
]}

机构：

[1] Osmangazi Univ, Fac Arts & Sci, Dept Chem, TR-26480 Eskisehir, Turkey

来源：

CORROSION ENGINEERING SCIENCE AND TECHNOLOGY | 2007年 / 42卷 / 03期

关键词：

copper corrosion; imidazole; hydrochloric acid; electrochemical methods;

D O I：

10.1179/174327807X214563

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the present study the inhibitive behaviour of 1H-imidazole, 1-methyl imidazole, imidazolidin-2-one, 4-(imidazole-1-yl) acetophenone, 4-(imidazole-1-yl) phenol and L-hystidine on the corrosion of copper in 0 center dot 1 M HCl has been investigated by potentiodynamic polarisation and polarisation resistance techniques. Except for 2-imidazolidone, the tested imidazole derivatives were found to behave as cathodic inhibitors. 1-methyl imidazole, 4-(imidazole-1-yl) acetophenone, 4-(imidazole-1-yl) phenol and L-hystidine were adsorbed on copper surface according to Temkin isotherm model. By using semi-empirical quantum chemical methods, physical parameters such as charge on the heteroatoms of imidazole derivatives q(n), energies of highest occupied molecular orbital ( HOMO) and lowest unoccupied molecular orbital (LUMO) and dipole moments were calculated. Possible correlations between these calculated physical parameters and inhibitor efficiencies were considered. Finally, the mechanistic information relating to the inhibition process was elucidated.

引用

页码：253 / 259

页数：7

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