Study on the phosphate/electrophoretic composite coatings on Mg alloy: The effect of phosphate conversion films on adhesion strength and corrosion resistance

doi:10.1016/j.surfcoat.2024.131109

IMR OpenIR

	Study on the phosphate/electrophoretic composite coatings on Mg alloy: The effect of phosphate conversion films on adhesion strength and corrosion resistance
	Yang, Jiayu 1,2; Dong, Kaihui 1,2; Song, Yingwei 1,2; Cheng, Xiaoyu 3; Han, En-Hou 1,4,5
通讯作者	Dong, Kaihui(khdong@imr.ac.cn) ; Song, Yingwei(ywsong@imr.ac.cn)
	2024-08-15
发表期刊	SURFACE & COATINGS TECHNOLOGY
ISSN	0257-8972
卷号	489 页码:14
摘要	Electrophoretic (EP) coating is one of the most useful methods for corrosion protection of Mg alloys. The phosphate conversion film (P film) is required before electrophoresis to improve the adhesion strength and corrosion resistance. In this work, the P films with different thickness prepared on the AZ31 Mg alloy by controlling the phosphating time. The adhesion strength and corrosion resistance of the P films and the corresponding electrophoretic composite (P-EP) coatings were investigated by pull-off tests and electrochemical impedance spectroscopy (EIS). The results show that the thickness of the P film is an important factor affecting the comprehensive performance of P-EP coatings, that is, with the increase of P film thickness, the corrosion resistance of P films increases, but the adhesion of P-EP decreases. The P-EP coating exhibits good adhesion but poor corrosion resistance when the P film is thin, and the P-EP coating with the P film thickness of about 3.5 mu m shows the best comprehensive performance at phosphating time of 10 min. Compared with the EP coating without phosphating pretreatment, the adhesion strength of the optimum P-EP coating increases by 50 % and the resistance value increases by two orders of magnitude.
关键词	Mg alloys Cathodic electrophoresis Conversion film Coating adhesion strength Corrosion resistance
资助者	Bintech-IMR R D Program ; SPMI-IMR Scientific and Technological Inno-vation Program
DOI	10.1016/j.surfcoat.2024.131109
收录类别	SCI
语种	英语
资助项目	Bintech-IMR R D Program[GYY-JSBU-2022-005] ; SPMI-IMR Scientific and Technological Inno-vation Program[JJ2022072]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Coatings & Films ; Physics, Applied
WOS记录号	WOS:001279989000001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/188544
专题	中国科学院金属研究所
通讯作者	Dong, Kaihui; Song, Yingwei
作者单位	1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Shanghai Spaceflight Precis Machinery Inst, Shanghai 201600, Peoples R China 4.Inst Corros Sci & Technol, Guangzhou 510530, Peoples R China 5.South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China
推荐引用方式 GB/T 7714	Yang, Jiayu,Dong, Kaihui,Song, Yingwei,et al. Study on the phosphate/electrophoretic composite coatings on Mg alloy: The effect of phosphate conversion films on adhesion strength and corrosion resistance[J]. SURFACE & COATINGS TECHNOLOGY,2024,489:14.
APA	Yang, Jiayu,Dong, Kaihui,Song, Yingwei,Cheng, Xiaoyu,&Han, En-Hou.(2024).Study on the phosphate/electrophoretic composite coatings on Mg alloy: The effect of phosphate conversion films on adhesion strength and corrosion resistance.SURFACE & COATINGS TECHNOLOGY,489,14.
MLA	Yang, Jiayu,et al."Study on the phosphate/electrophoretic composite coatings on Mg alloy: The effect of phosphate conversion films on adhesion strength and corrosion resistance".SURFACE & COATINGS TECHNOLOGY 489(2024):14.