Inhibition effect of 4-amino-antipyrine on the corrosion of copper in 3 wt.% NaCl solution

被引：117

作者：

Hong, Song ^{[1
]}

Chen, Wen ^{[1
]}

Luo, Hong Qun ^{[1
]}

Li, Nian Bing ^{[1
]}

机构：

[1] Southwest Univ, Key Lab Ecoenvironm Three Gorges Reservoir Reg, Minist Educ, Sch Chem & Chem Engn, Chongqing 400715, Peoples R China

来源：

CORROSION SCIENCE | 2012年 / 57卷

关键词：

Copper; EIS; Polarisation; Weight loss; Oxygen reduction; MILD-STEEL CORROSION; HYDROCHLORIC-ACID SOLUTION; SODIUM-CHLORIDE SOLUTIONS; POTASSIUM ETHYL XANTHATE; IMPEDANCE SPECTROSCOPY; ADSORPTION BEHAVIOR; PICKLING SOLUTIONS; DERIVATIVES; MEDIA; RATES;

D O I：

10.1016/j.corsci.2011.12.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of 4-amino-antipyrine (AAP) on the corrosion of copper in 3.0 wt.% NaCl was investigated using weight loss, potentiodynamic polarisation, and electrochemical impedance spectroscopy. The results revealed that AAP acts as a mixed-type inhibitor with more pronounced effect on anodic domain and the inhibition efficiency decreases with increasing the temperature. The adsorption of AAP was found to obey the Langmuir isotherm. Surface characterisation was performed using scanning electron microscope and Fourier transform infrared spectrometer. Quantum chemical calculations show that AAP has large negative charge in nitrogen and oxygen atoms, which facilitates the adsorption of AAP on the copper surface. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：270 / 278

页数：9

共 52 条

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