Optimization of thermal control and corrosion resistance of PEO coatings on 7075 aluminum alloy by frequency alteration

doi:10.1016/j.surfcoat.2022.128797

CORC > 金属研究所 > 中国科学院金属研究所

	Optimization of thermal control and corrosion resistance of PEO coatings on 7075 aluminum alloy by frequency alteration
	Zhu, Mingyu 1,2; Song, Yingwei 1; Liu, Zihe 1,2; Xu, Dongsheng 2; Dong, Kaihui 1,2; Han, En-Hou 2
刊名	SURFACE & COATINGS TECHNOLOGY
	2022-09-25
卷号	446 页码:12
关键词	Plasma electrolytic oxidation Frequency Aluminum alloys Emissivity Corrosion resistance Thermal control
ISSN号	0257-8972
DOI	10.1016/j.surfcoat.2022.128797
通讯作者	Song, Yingwei(ywsong@imr.ac.cn)
英文摘要	The coatings with high emissivity and corrosion resistance are prepared successfully on 7075 aluminum alloy by plasma electrolytic oxidation (PEO). The effect of frequencies of 100 Hz, 200 Hz, 400 Hz, and 600 Hz on the microstructure, chemical composition, emissivity and corrosion resistance of the coatings are investigated. The results show that the main chemical composition of PEO coatings includes Al, O, Si, P, and V elements, and the content of different vanadium oxides determines the emissivity of the coatings, that is, the black V2O3 instead of brown V2O5 can greatly enhance the emissivity. Under the action of bipolar pulse, frequency exhibits an opposite effect on the emissivity and corrosion resistance of the PEO coatings. With increasing frequencies, the emissivity of the PEO coatings declines due to the decrease of V2O3 content, while the corrosion resistance is improved due to the decrease of spark discharge intensity to avoid pores and cracks in the coatings. The PEO coating prepared under the frequency of 400 Hz presents the highest infrared emissivity larger than 0.85 and good corrosion resistance.
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000848078900003
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/175064]
专题	金属研究所_中国科学院金属研究所
通讯作者	Song, Yingwei
作者单位	1.Univ Sci & Technol China, Sch Mat & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Mingyu,Song, Yingwei,Liu, Zihe,et al. Optimization of thermal control and corrosion resistance of PEO coatings on 7075 aluminum alloy by frequency alteration[J]. SURFACE & COATINGS TECHNOLOGY,2022,446:12.
APA	Zhu, Mingyu,Song, Yingwei,Liu, Zihe,Xu, Dongsheng,Dong, Kaihui,&Han, En-Hou.(2022).Optimization of thermal control and corrosion resistance of PEO coatings on 7075 aluminum alloy by frequency alteration.SURFACE & COATINGS TECHNOLOGY,446,12.
MLA	Zhu, Mingyu,et al."Optimization of thermal control and corrosion resistance of PEO coatings on 7075 aluminum alloy by frequency alteration".SURFACE & COATINGS TECHNOLOGY 446(2022):12.