Corrosion of conductive polypyrrole: Effects of environmental factors, electrochemical stimulation, and doping anions

被引：45
|
作者：
Qi, Kai [1 ]
Qiu, Yubing [1 ]
Chen, Zhenyu [1 ,2 ]
Guo, Xingpeng [1 ,2 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Wuhan 430074, Peoples R China
[2] Hubei Key Lab Mat Chem & Serv Failure, Wuhan 430074, Peoples R China
来源：
CORROSION SCIENCE | 2012年 / 60卷
关键词：
Polymer; Cyclic voltammetry; Alkaline corrosion; ION-EXCHANGE BEHAVIOR; IN-SITU FTIR; CONFORMATIONAL RELAXATION; OVEROXIDATION PROCESSES; CHEMICAL-SYNTHESIS; STAINLESS-STEEL; STABILITY; POLYMERS; FILMS; DEGRADATION;
D O I：
10.1016/j.corsci.2012.04.013
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of environmental factors, electrochemical stimulation, and doping anions on the corrosion behaviour of conductive polypyrrole (PPy) films in alkaline aqueous media were studied with cyclic voltammetry, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. High concentrations of electrolyte, low dissolved oxygen and low temperatures enhance the stability of PPy. Polarising PPy at a negative potential inhibits its corrosion obviously. PPy doped with large counter anions shows better corrosion resistance than PPy doped with small counter ions. The possible mechanism involved in PPy corrosion process is discussed. (c) 2012 Elsevier Ltd. All rights reserved.
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页码：50 / 58
页数：9
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