中国科学院重庆绿色智能技术研究院机构知识库

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	Influence of Different Electrolyte Additives and Structural Characteristics of Plasma Electrolytic Oxidation Coatings on AZ31 Magnesium Alloy
	Huang, Zhiquan1; Wang, Ruiqiang2,3; Liu, Xintong1,4; Wang, Dongdong1; Zhang, Heng5; Shen, Xiaojie6; Shen, Dejiu1; Li, Dalong7
	2020-09-01
摘要	Coatings prepared by different electrolyte additives were investigated on AZ31 magnesium alloy by plasma electrolytic oxidation. In this study, scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction analysis were employed to assess the morphologies, chemical and phase compositions of the plasma electrolytic oxidation (PEO) coatings, respectively. Furthermore, electrochemical impedance spectroscopy was used to evaluate the corrosion behavior of the composite coating. The investigation of the effect of electrolyte additives in the base electrolyte showed that the PEO specimens exhibit different surface and cross-sectional morphologies, and phase compositions. The results showed that SiO32- was conducive to the growth of the ceramic layer, and the ceramic layer developing in the electrolyte which contained AlO2- showed a typical double-layer structure. The corrosion resistance of coating formed in a phosphate bath was higher than that of the coating formed in silicate bath and coating formed in an aluminate bath. Moreover, the corrosion resistance of the coating formed in the fluoride bath was the highest.
关键词	magnesium alloy plasma electrolytic oxidation electrolyte additive corrosion behavior
DOI	10.3390/coatings10090817
发表期刊	COATINGS
卷号	10期号:9页码:11
通讯作者	Li, Dalong(gmzhang@ysu.edu.cn)
收录类别	SCI
WOS记录号	WOS:000581375800001
语种	英语