Effects of second phases on the formation mechanism and corrosion resistance of phosphate conversion film on AZ80 Mg alloy

doi:10.1108/ACMM-05-2018-1935

IMR OpenIR

	Effects of second phases on the formation mechanism and corrosion resistance of phosphate conversion film on AZ80 Mg alloy
	Xu, Zubin; Song, Yingwei; Dong, Kaihui; Shan, Dayong; Han, En-Hou
通讯作者	Song, Yingwei(ywsong@imr.ac.cn)
	2018
发表期刊	ANTI-CORROSION METHODS AND MATERIALS
ISSN	0003-5599
卷号	65 期号:6 页码:587-593
摘要	Purpose The formation and corrosion processes of a conversion film on the AZ80 Mg alloy with different second phases were compared to clarify the effect of microstructure on the quality of protective coatings. Design/methodology/approach The size and distribution of second phases in the edge and central regions of the AZ80 cast ingot exhibit a great difference. The film growth processes and their corrosion resistance on the edge and central regions of the AZ80 cast ingot were investigated by scanning electron microscope observations, immersion tests and electrochemical measurements. Findings The results indicate that second phases act as micro-cathodes and hydrogen evolution reaction occurs on their surface, which is not beneficial for the deposition of the conversion film. Originality/value The conversion film formed on the central regions of AZ80 cast ingot with a low volume fraction of second phases exhibits a more uniform surface and higher corrosion resistance than that formed on the edge regions of the sample with a higher volume fraction of second phases.
关键词	Corrosion resistance Formation mechanism AZ80 Mg alloy Conversion film Micro-cathodes Second phases
DOI	10.1108/ACMM-05-2018-1935
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000448724400008
出版者	EMERALD GROUP PUBLISHING LTD
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/130075
专题	中国科学院金属研究所
通讯作者	Song, Yingwei
作者单位	Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Xu, Zubin,Song, Yingwei,Dong, Kaihui,et al. Effects of second phases on the formation mechanism and corrosion resistance of phosphate conversion film on AZ80 Mg alloy[J]. ANTI-CORROSION METHODS AND MATERIALS,2018,65(6):587-593.
APA	Xu, Zubin,Song, Yingwei,Dong, Kaihui,Shan, Dayong,&Han, En-Hou.(2018).Effects of second phases on the formation mechanism and corrosion resistance of phosphate conversion film on AZ80 Mg alloy.ANTI-CORROSION METHODS AND MATERIALS,65(6),587-593.
MLA	Xu, Zubin,et al."Effects of second phases on the formation mechanism and corrosion resistance of phosphate conversion film on AZ80 Mg alloy".ANTI-CORROSION METHODS AND MATERIALS 65.6(2018):587-593.