Improved Corrosion Resistance of Magnesium Alloys AZ31 and AZ91HP by High Current Pulsed Electron Beam Treatment
来源期刊：材料热处理学报2004年第5期
论文作者：ZHOU Ji-yang DONG Chuang GAO Bo HAO Sheng- zhi
关键词：magnesium alloy; HCPEB; surface treatment; corrosion resistance;
摘 要：Surface treatment of magnesium alloys AZ31 and AZ91HP by a high current pulsed electron beam (HCPEB)was investigated in the present paper. The corrosion resistance of treated samples was tested in a 5% (wt%) NaCl solution,showing remarkably improvement as manifested by polarization curves. According to EPMA analysis, the intermetallic Mg17Al12 in the surface layer of AZ91HP sample almost disappeared after the treatment of HCPEB, leaving the surface layer in a state of supersaturated solid solution. Both the augmentation of aluminum content and the formation of supersaturated structure in the surface layer are believed to contribute to the improved corrosion resistance of AZ31 and AZ91HP.
ZHOU Ji-yang1，DONG Chuang2，GAO Bo1，HAO Sheng- zhi2
(1.Department of material engineering, Dalian University of Technology, Dalian, China;
2.State key laboratory for material modification by laser, ion and electron beams, Dalian University of Technology, Dalian, China)
摘要:Surface treatment of magnesium alloys AZ31 and AZ91HP by a high current pulsed electron beam (HCPEB)was investigated in the present paper. The corrosion resistance of treated samples was tested in a 5% (wt%) NaCl solution,showing remarkably improvement as manifested by polarization curves. According to EPMA analysis, the intermetallic Mg17Al12 in the surface layer of AZ91HP sample almost disappeared after the treatment of HCPEB, leaving the surface layer in a state of supersaturated solid solution. Both the augmentation of aluminum content and the formation of supersaturated structure in the surface layer are believed to contribute to the improved corrosion resistance of AZ31 and AZ91HP.
关键词:magnesium alloy; HCPEB; surface treatment; corrosion resistance;
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