Effects of chromate and chromate conversion coatings on corrosion of aluminum alloy 2024-T3

被引：230
作者：
Zhao, J
Xia, L
Sehgal, A
Lu, D
McCreery, RL
Frankel, GS
机构：
[1] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA
[2] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA
来源：
SURFACE & COATINGS TECHNOLOGY | 2001年 / 140卷 / 01期
关键词：
corrosion; conversion coating; aluminum; chromate;
D O I：
10.1016/S0257-8972(01)01003-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Various effects of chromate conversion coatings (CCCs) and chromate in solution on the corrosion of AA2024-T3 and pure Al are studied in this work. Raman spectroscopy was used to investigate the nature of chromate in CCCs through a comparison with the spectra of known standards and artificial Cr(III)/Cr(VI) mixed oxides. Chromate was shown to be released from CCCs and to migrate to and protect a nearby, uncoated area in the artificial scratch cell. However, experiments investigating the effect of chromate in solution on anodic dissolution kinetics under potentiostatic control indicated that large chromate concentrations were needed to have an effect. (C) 2001 Elsevier Science B.V. All rights reserved.
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页码：51 / 57
页数：7
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