Role of doping, ions in the corrosion protection of iron by polypyrrole films

被引：109

作者：

Hien, NTL

Garcia, B

Pailleret, A

Deslouis, C

机构：

[1] Univ Paris 06, CNRS, UPR 15, LISE, F-75252 Paris 05, France

[2] CNST, ITT, Hanoi, Vietnam

[3] Univ Montreal, UMR 2289,LIME, CNRS, Fac Arts Sci,Dept Chim, Montreal, PQ H3C 3J7, Canada

来源：

ELECTROCHIMICA ACTA | 2005年 / 50卷 / 7-8期

关键词：

polypyrrole; corrosion; surfactant; protective coating;

D O I：

10.1016/j.electacta.2004.10.072

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Duplex polypyrrole (PPy) films have been electrochemically synthesized on iron to be used as protective coatings against corrosion. The inner film was doped with tetraoxalate anions and the outer one with dodecyl sulfate anions. The protection against corrosion of this coating was tested in sodium chloride solutions: an increase in the protection time by one order of magnitude with respect to an oxalate-doped PPy film of the same total thickness was measured. The proposed mechanism was based on a change in the permselectivity of the film from anion exchange to cation exchange, thus preventing from the ingress of corrosive chloride anions. (C) 2004 Elsevier Ltd. All rights reserved.

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页码：1747 / 1755

页数：9

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