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Effect of extrusion on corrosion behavior and corrosion mechanism of Mg-Y alloy
Alternative TitleEffect of extrusion on corrosion behavior and corrosion mechanism of Mg-Y alloy
Xu Hong1; Zhang Xin2; Zhang Kui3; Shi Yang4; Ren Jiping1
2016
Source PublicationJOURNAL OF RARE EARTHS
ISSN1002-0721
Volume34Issue:3Pages:315-327
AbstractThe 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.
Other AbstractThe 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.
KeywordCA ALLOYS MAGNESIUM MICROSTRUCTURE RESISTANCE AZ91D extrusion Mg-Y alloy corrosion behavior corrosion mechanism rare earths
Indexed ByCSCD
Language英语
Funding Project[National Key Technology R&D Program of China]
CSCD IDCSCD:5655253
Citation statistics
Cited Times:5[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/146347
Collection中国科学院金属研究所
Affiliation1.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
Recommended Citation
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.
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