Inhibition of filiform corrosion on polymer coated AA2024-T3 by hydrotalcite-like pigments incorporating organic anions

被引：102

作者：

Williams, G ^{[1
]}

McMurray, HN ^{[1
]}

机构：

[1] Univ Wales Swansea, Sch Engn, Mat Res Ctr, Swansea SA2 8PP, W Glam, Wales

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2004年 / 7卷 / 05期

关键词：

D O I：

10.1149/1.1691529

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Benzotriazolate, ethyl xanthate, and oxalate anion-exchanged hydrotalcite (HT) pigments are evaluated with respect to their ability to inhibit filiform corrosion (FFC) on organic coated AA2024-T3 aluminum alloy. Following FFC initiation by application of aqueous HCl to a penetrative coating defect, the time-dependent extent of coating delamination was determined both optically and by repeated in situ measurements performed using a scanning Kelvin probe (SKP). Inhibitor efficiency is shown to increase in the order ethyl xanthate << oxalate < benzotriazolate. Benzotriazolate is also shown to interact specifically with the alloy surface, depressing Volta potential values by up to 0.4 V. (c) 2004 The Electrochemical Society.

引用

页码：B13 / B15

页数：3

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