Influence of surface pretreatments on the corrosion protection of sol-gel coated AA2024-T3 aluminium alloy

被引：21

作者：

Feng, Z. ^{[1
]}

Liu, Y. ^{[1
]}

Hashimoto, T. ^{[1
]}

Thompson, G. E. ^{[1
]}

Zhou, X. ^{[1
]}

Skeldon, P. ^{[1
]}

机构：

[1] Univ Manchester, Sch Mat, Ctr Corros & Protect, Manchester M13 9PL, Lancs, England

来源：

SURFACE AND INTERFACE ANALYSIS | 2013年 / 45卷 / 10期

基金：

英国工程与自然科学研究理事会;

关键词：

sol-gel coatings; AA2024-T3 aluminium alloy; alkaline etching; acid cleaning; 2ND PHASE; COATINGS;

D O I：

10.1002/sia.5216

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In the present study, the effects of surface pretreatments of AA2024 aluminium alloy on the corrosion protection of the alloy using a sol-gel coating were investigated. It was revealed that the second phase particles that remain after etching and desmutting have a significant impact on the subsequent sol-gel coating which, in turn, influences the overall corrosion protection afforded to the substrate by the sol-gel coating. The removal of second phase particles in the surface region can be achieved by an alternative surface pretreatment using nitric acid. A significant improvement of corrosion protection of sol-gel coated AA2024 aluminium alloy was observed when the surface of the alloy was pretreated with nitric acid. Copyright (c) 2013 John Wiley & Sons, Ltd.

引用

页码：1452 / 1456

页数：5

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