Corrosion protection of iron by polystyrenesulfonate-doped polypyrrole films

被引：2
|
作者：
Le, HNT
Garcia, B
Deslouis, C
Le Xuan, Q
机构：
[1] Univ Paris 06, Lab Phys Liquides & Electrochim, CNRS, UPR 15, F-75252 Paris 05, France
[2] CNST, ITT, Hanoi, Vietnam
来源：
JOURNAL OF APPLIED ELECTROCHEMISTRY | 2002年 / 32卷 / 01期
关键词：
conducting polymer; iron corrosion; polypyrrole; polystyrenesulfonate;
D O I：
10.1023/A:1014273624807
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Electropolymerized polypyrrole (PPy) has been studied as a protective coating for iron in NaCl 3% corrosive medium. The protection mechanism is of the galvanic type, and the main cause for the loss of protection is the progressive invasion of the film by chloride anions. To reduce exchanges between PPy counter-ions and chloride anions, a composite polyanions/PPy film was used. Polystyrenesulfonate was chosen as a large size counter-ion which could be trapped in the polymer matrix. Due to the negligible mobility of these anions, the film permselectivity changed from anionic to cationic. A significant improvement in PPy film protection efficiency was obtained.
引用
收藏
页码：105 / 110
页数：6
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