Inhibition effect of nonionic surfactant on the corrosion of cold rolled steel in hydrochloric acid

被引：185

作者：

Li, Xianghong ^{[1
]}

Deng, Shuduan ^{[2
]}

Mu, Guannan ^{[3
]}

Fu, Hui ^{[1
]}

Yang, Fazhong ^{[1
]}

机构：

[1] SW Forestry Univ, Dept Fundamental Courses, Kunming 650224, Peoples R China

[2] SW Forestry Univ, Dept Wood Sci & Technol, Kunming 650224, Peoples R China

[3] Yunnan Univ, Dept Chem, Kunming 650091, Peoples R China

来源：

CORROSION SCIENCE | 2008年 / 50卷 / 02期

关键词：

steel; AFM; polarization; weight loss; acid inhibition;

D O I：

10.1016/j.corsci.2007.08.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The inhibition effect of Tween-20 as a nonionic surfactant on the corrosion of cold. rolled steel (CRS) in 1.0-8.0 M HCl has been studied at different temperatures (20-50 degrees C) by weight loss and potentiodynamic polarization methods. Atomic force microscope (AFM) provided the CRS surface conditions. The results show that Tween-20 is a good inhibitor in 1.0 M HCl, and the inhibition efficiency (1E) increases with the inhibitor concentration, while decreases with increasing the hydrochloric acid concentration and temperature. Effect of immersion time was also studied and discussed. The adsorption of inhibitor on the CRS surface obeys the Langmuir adsorption isotherm equation. Both thermodynamic and kinetic parameters have been obtained by adsorption theory and kinetic equations. The inhibition effect is satisfactorily explained by the parameters. Polarization curves show that Tween-20 is a mixed-type inhibitor in hydrochloric acid. The results obtained from weight loss and polarization are in good agreement, and Tween-20 inhibition action could also be evidenced by surface AFM images. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：420 / 430

页数：11

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