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

被引：20
|
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
收藏
页码：1452 / 1456
页数：5
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