Investigation of the inhibitive effect of ortho-substituted anilines on corrosion of iron in 1 M HCl solutions

被引：258

作者：

Khaled, KF ^{[1
]}

Hackerman, N ^{[1
]}

机构：

[1] Rice Univ, Dept Chem, Houston, TX 77005 USA

来源：

ELECTROCHIMICA ACTA | 2003年 / 48卷 / 19期

关键词：

iron; polarization; EIS; acid inhibition;

D O I：

10.1016/S0013-4686(03)00318-9

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The inhibitory activity of some o-substituted anilines on iron corrosion in hydrochloric acid (HCl) was studied in relation to inhibitor concentration using potentiodynamic and electrochemical impedance spectroscopy (EIS) measurements. O-substituted anilines were found to act as mixed type inhibitors. The results showed that o-substituted anilines suppressed both cathodic and anodic processes of iron corrosion in 1 M HCl by its adsorption on the iron surface according to Langmuir adsorption isotherm. Potentiodynamic and EIS measurements reveal that these compounds inhibit the iron corrosion in 1 M HCl and that the efficiency increases with increasing of the inhibitor concentration. Data obtained from EIS are analyzed to model the corrosion inhibition process through equivalent circuit. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：2715 / 2723

页数：9

共 25 条

[1] The inhibition of 4-(2′-amino-5′-methylphenylazo) antipyrine on corrosion of mild steel in HCl solution [J].