Investigation of the inhibitive effect of ortho-substituted anilines on corrosion of iron in 0.5 M H2SO4 solutions

被引：80

作者：

Khaled, KF ^{[1
]}

Hackerman, N ^{[1
]}

机构：

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

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2003年 / 82卷 / 03期

关键词：

iron; potentiodynamic polarization; EIS; acid corrosion inhibition;

D O I：

10.1016/j.matchemphys.2003.08.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The inhibiting action of six o-substituted anilines against the corrosion of iron (99.9999%) in solutions of sulphuric acid has been studied using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). At inhibitor concentration range (10(-3) to 10(-2) M) in 0.5 M acid, the efficiency of the inhibitors increases in the order o-toluidine < 2-chloroaniline < 2-ethylaniline < 2-fluoroaniline < o-aminoanisole < 2-amiophenetole. Comparable results were obtained by the different electrochemical methods used. Adsorption of these compounds on the iron surface was found to obey a Langmuir adsorption isotherm. An equivalent circuit is suggested based on analysis of EIS data. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：949 / 960

页数：12

共 20 条

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