Corrosion properties of plasma electrolytic oxidation coatings on an aluminium alloy - The effect of the PEO process stage

被引：108
|
作者：
Dehnavi, Vahid [1 ]
Shoesmith, David W. [2 ]
Luan, Ben Li [3 ,4 ]
Yari, Mehdi [4 ]
Liu, Xing Yang [3 ]
Rohani, Sohrab [1 ]
机构：
[1] Univ Western Ontario, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada
[2] Univ Western Ontario, Dept Chem, Surface Sci Western, London, ON N6A 5B7, Canada
[3] Natl Res Council Canada, London, ON N6G 4X8, Canada
[4] Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2015年 / 161卷
关键词：
Ceramics; Coatings; Plasma deposition; Electron microscopy; Corrosion; Microstructure; CERAMIC COATINGS; MAGNESIUM ALLOY; MICROARC OXIDATION; TI SUBSTRATE; BEHAVIOR; AL; RESISTANCE; MICROSTRUCTURE; MECHANISM; PERFORMANCE;
D O I：
10.1016/j.matchemphys.2015.04.058
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Plasma electrolytic oxidation (PEO) coatings were grown on an aluminium alloy substrate using different processing parameters which enabled samples to be coated to different stages of the PEO process. Electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR) techniques were employed to investigate the impedance properties of the resulting oxide coatings which will determine the corrosion performance of the coated alloy. Scanning electron microscopy was used to relate the morphology of the coatings with their corrosion performance. A direct relationship was found between the stage of the PEO process, which affects the microstructure of the coatings, and the corrosion performance. Coating thickness and phase composition did not have any measurable influence on coating corrosion performance. To some degree corrosion performance could be tailored by the processing parameters. Crown Copyright (C) 2015 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：49 / 58
页数：10
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