A preliminary investigation of corrosion inhibition of mild steel in 0.5 M H2SO4 by 2-amino-5-(n-pyridyl)-1,3,4-thiadiazole: Polarization, EIS and molecular dynamics simulations

被引：157

作者：

Tang, Yongming ^{[1
]}

Yang, Xiaoyuan ^{[1
]}

Yang, Wenzhong ^{[1
]}

Wan, Rong ^{[1
]}

Chen, Yizhong ^{[2
]}

Yin, Xiaoshuang ^{[1
]}

机构：

[1] Nanjing Univ Technol, Sch Sci, Nanjing 210009, Peoples R China

[2] Jiangsu Polytech Univ, Sch Environm & Safety Engn, Changzhou 213164, Peoples R China

来源：

CORROSION SCIENCE | 2010年 / 52卷 / 05期

关键词：

Acid solutions; Mild steel; EIS; Modelling studies; Polarization; Acid inhibition; ORTHO-SUBSTITUTED ANILINES; ADSORPTION BEHAVIOR; ACID-SOLUTIONS; IRON; DERIVATIVES; HCL; COPPER; MEDIA; MONOLAYERS; MECHANISM;

D O I：

10.1016/j.corsci.2010.01.028

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The efficiency, as steel corrosion inhibitors in 0.5 M H2SO4, of two thiadiazole derivatives, 2-amino-5-(3-pyridyl)-1,3,4-thiadiazole (3-APTD) and 2-amino-5-(4-pyridyl)-1,3,4-thiadiazole (4-APTD), was investigated by polarization and electrochemical impedance spectroscopy. The protection efficiency increases with increasing inhibitors concentration, but the temperature has hardly effect on the inhibition efficiency of APTD. The adsorption of APTD on iron surface obeys the Langmuir isotherm. The experimental results show that the inhibition efficiency of 4-APTD is higher than that of 3-APTD, and the molecular dynamics (MD) simulations show that the adsorption of 4-APTD on iron surface has the higher binding energy than that of 3-APTD. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1801 / 1808

页数：8

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