Microstructure and corrosion resistance of ultrasonic micro-arc oxidation biocoatings on magnesium alloy
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- 作者：Lijie Qu (1) (2)
Muqin Li (1) (2)
Miao Liu (3)
Erlin Zhang (2)
Chen Ma (2) - 关键词：micro ; arc oxidation (MAO) ; ultrasonic treatment ; magnesium alloy ; microstructure ; corrosion resistance
- 刊名：Journal of Advanced Ceramics
- 出版年：2013
- 出版时间：September 2013
- 年：2013
- 卷：2
- 期：3
- 页码：227-234
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Muqin Li (1) (2)
Miao Liu (3)
Erlin Zhang (2)
Chen Ma (2)
1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China
2. Department of Materials Science and Engineering, Jiamusi University, Jiamusi, 154007, China
3. Department of Stomatology, Jiamusi University, Jiamusi, 154007, China - ISSN：2227-8508
文摘
The ultrasonic micro-arc oxidation (UMAO) was used to fabricate ceramic coatings on magnesium alloy. UMAO coatings were produced at 60 W input ultrasonic. The effects of the ultrasound on the microstructure, phase composition, elemental distribution and corrosion resistance of the coatings were extensively investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectrometry (EDX) and electrochemical workstation. The results showed that ultrasound improved the homogeneous distribution of micro-porous structure. The coatings were mainly composed of MgO ceramic and small amount of calcium and phosphorus with porous structure. The Ca/P ratio of the coatings increased when 60 W ultrasonic was used. The corrosion potential in simulated body fluid (SBF) changed from ?.583 V of bare magnesium alloy to ?.353 V of magnesium alloy coated under 60 W ultrasonic. The corrosion resistance of UMAO coatings was better than that of MAO coatings.