Corrosion protection of mild steel by electroactive polyaniline coatings

被引：192

作者：

Li, P ^{[1
]}

Tan, TC ^{[1
]}

Lee, JY ^{[1
]}

机构：

[1] NATL UNIV SINGAPORE,DEPT CHEM ENGN,SINGAPORE 119265,SINGAPORE

来源：

SYNTHETIC METALS | 1997年 / 88卷 / 03期

关键词：

polyaniline and derivatives; corrosion protection; ac impedance; passivation; anti-corrosion coating;

D O I：

10.1016/S0379-6779(97)03860-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ability of polyaniline (PANi) to act as a protective coating for mild steel corrosion in saline and acid was investigated by electrochemical impedance spectroscopy. The impedance behaviour is best explained by a mediated redox reaction in which PANi passivates the metal surface and reoxidizes itself by dissolved oxygen. The effectiveness of such a process, which also provides the repassivation of damaged films, is greater in acids. The performance of PANi is further enhanced by the presence of a top coat to increase the diffusional resistance for the corrosion species.

引用

页码：237 / 242

页数：6

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