Effect of extrusion on corrosion behavior and corrosion mechanism of Mg-Y alloy

IMR OpenIR

	Effect of extrusion on corrosion behavior and corrosion mechanism of Mg-Y alloy
其他题名	Effect of extrusion on corrosion behavior and corrosion mechanism of Mg-Y alloy
	Xu Hong 1; Zhang Xin 2; Zhang Kui 3; Shi Yang 4; Ren Jiping 1
	2016
发表期刊	JOURNAL OF RARE EARTHS
ISSN	1002-0721
卷号	34 期号:3 页码:315-327
摘要	The influences of the hot extrusion process on the microstructure, corrosion behavior and corrosion mechanism for Mg-Y magnesium alloy were studied by means of the microstructure observation, weight loss test, electrochemical test and corrosion morphology test. The results showed that with increasing of the extrusion ratio, the shear flow line on the vertical section of the extruded alloy increased, the shear bands parallel lines became more clearly visible, and a large number of fine equiaxed grains distributed in parallel with the flow lines. The open circuit potential had a certain degree of improvement after extrusion, the open circuit potential increased with increment of extrusion ratio, and the corrosion potential of the vertical section was higher than that of the same alloy in the same compression ratio. The shift rate of the corrosion potential relatively became larger with increasing of the extrusion ratio, and the cathode corrosion current corresponding to the branch migration shifted to the positive direction. The high frequency capacitive arc increased with increment of the extrusion ratio, and the radius of capacitive arc of the vertical section was slightly larger than that of the transverse section. The corrosion morphologies of Mg-0.25Y alloy were uniform corrosion, and the corrosion morphologies of Mg-(2.5, 5, 8 and 15) were the pitting corrosion and the small range, deep depth localized corrosion.
其他摘要	The influences of the hot extrusion process on the microstructure, corrosion behavior and corrosion mechanism for Mg-Y magnesium alloy were studied by means of the microstructure observation, weight loss test, electrochemical test and corrosion morphology test. The results showed that with increasing of the extrusion ratio, the shear flow line on the vertical section of the extruded alloy increased, the shear bands parallel lines became more clearly visible, and a large number of fine equiaxed grains distributed in parallel with the flow lines. The open circuit potential had a certain degree of improvement after extrusion, the open circuit potential increased with increment of extrusion ratio, and the corrosion potential of the vertical section was higher than that of the same alloy in the same compression ratio. The shift rate of the corrosion potential relatively became larger with increasing of the extrusion ratio, and the cathode corrosion current corresponding to the branch migration shifted to the positive direction. The high frequency capacitive arc increased with increment of the extrusion ratio, and the radius of capacitive arc of the vertical section was slightly larger than that of the transverse section. The corrosion morphologies of Mg-0.25Y alloy were uniform corrosion, and the corrosion morphologies of Mg-(2.5, 5, 8 and 15) were the pitting corrosion and the small range, deep depth localized corrosion.
关键词	CA ALLOYS MAGNESIUM MICROSTRUCTURE RESISTANCE AZ91D extrusion Mg-Y alloy corrosion behavior corrosion mechanism rare earths
收录类别	CSCD
语种	英语
资助项目	[National Key Technology R&D Program of China]
CSCD记录号	CSCD:5655253
引用统计	被引频次：11[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/146347
专题	中国科学院金属研究所
作者单位	1.North Univ China, Sch Materials Sci & Engn, Taiyuan 030051, Peoples R China 2.China Datang Coporat Sci & Technol Res Institute, Institute Thermal Power Generat Technol, Beijing 102206, Peoples R China 3.Gen Res Institute Nonferrous Met, State Key Lab Fabricat & Proc Nonferrous Met, Beijing 100088, Peoples R China 4.中国科学院金属研究所
推荐引用方式 GB/T 7714	Xu Hong,Zhang Xin,Zhang Kui,et al. Effect of extrusion on corrosion behavior and corrosion mechanism of Mg-Y alloy[J]. JOURNAL OF RARE EARTHS,2016,34(3):315-327.
APA	Xu Hong,Zhang Xin,Zhang Kui,Shi Yang,&Ren Jiping.(2016).Effect of extrusion on corrosion behavior and corrosion mechanism of Mg-Y alloy.JOURNAL OF RARE EARTHS,34(3),315-327.
MLA	Xu Hong,et al."Effect of extrusion on corrosion behavior and corrosion mechanism of Mg-Y alloy".JOURNAL OF RARE EARTHS 34.3(2016):315-327.