Improved Corrosion Resistance of Magnesium Alloys AZ31 and AZ91HP by High Current Pulsed Electron Beam Treatment

作     者：HAOSheng-zhi GAOBo ZHOUJi-yang DONGChuang 

作者机构：StatekeylaboratoryformaterialmodificationbylaserionandelectronbeamsDalianUniversityofTechnologyDalianChina DepartmentofmaterialengineeringDalianUniversityofTechnologyDalianChina 

出 版 物：《材料热处理学报》 (Transactions of Materials and Heat Treatment)

年 卷 期：2004年第25卷第5B期

页      面：1037-1040页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0704[理学-天文学] 080201[工学-机械制造及其自动化] 0702[理学-物理学] 

基　　金：the scientific research foundation for the returned overseas Chinese scholars from state education ministry of P.R.China. 

主　　题：AZ31 AZ91HP 镁合金 耐蚀性 HCPEB 热处理 

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.