Effect of the Cu Content on the Microstructure and Corrosion Behavior of PEO Coatings on Al-xCu Alloys

被引：23
作者：
Zhu, Liye [1 ,2 ]
Zhang, Wei [2 ,3 ]
Zhang, Tao [1 ,4 ]
Qiu, Ji [5 ]
Cao, Jingyi [6 ]
Wang, Fuhui [2 ,4 ]
机构：
[1] Harbin Engn Univ, Coll Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China
[2] Inst Met, Shenyang Natl Lab Mat Sci, Corros & Protect Div, Shenyang 110016, Liaoning, Peoples R China
[3] Jilin Normal Univ, Key Lab Preparat & Applicat Environm Friendly Mat, Changchun 130103, Jilin, Peoples R China
[4] Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat MoE, Shenyang 110819, Liaoning, Peoples R China
[5] Acad Armored Forces Engn, Dept Equipment Maintenance & Remfg, Beijing 100072, Peoples R China
[6] Navy Coating Anal & Test Ctr, Beijing 102442, Peoples R China
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2018年 / 165卷 / 09期
基金：
中国国家自然科学基金;
关键词：
PLASMA ELECTROLYTIC OXIDATION; MAGNESIUM ALLOY; ALUMINUM-ALLOY; ANODIC FILMS; TRIBOLOGICAL PROPERTIES; PHASE-COMPOSITION; WEAR-RESISTANCE; SILICATE; COPPER; TITANIUM;
D O I：
10.1149/2.0471809jes
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
In this study, scanning electron microscopy and electrochemical techniques were used to investigate the effect of the Cu content on the microstructure and corrosion resistance of plasma electrolytic oxidation (PEO) coatings on Al-xCu alloys. The results showed that Cu in the substrate alloy was used to promote the intensity and the transformation process of the microdischarges, which led to the undulating-ribbon feature of cross-sectional morphologies. The formation of pores and cracks in the coatings was facilitated by the oxygen release due to the oxidation of O2- and the dissolution of copper oxide. Meanwhile, the average porosity of PEO coatings distinctly increased with the increase in the Cu content, which is the key factor causing the decreased corrosion resistance of PEO coatings. (C) The Author(s) 2018. Published by ECS.
引用
收藏
页码：C469 / C483
页数：15
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