Corrosion Resistance of AZ91 Mg Alloy Modified by High-Current Pulsed Electron Beam

• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2019,（2）
• 页码范围: 218-226
• 页数: 9页
• 语种: 英文

摘要

The high-current pulsed electron beam (HCPEB) treatment with current density 6 J/cm2 was applied on AZ91 Mg alloy to improve its corrosion resistance.Results showed that the net-like Mg17Al12 disappeared on the surface of AZ91 Mg alloy after irradiation by HCPEB,which was instead of supersaturated A1 element on the surface.Nevertheless,the application of HCPEB also led to the formation of crater-like and groove-like structures as well as micro-cracks on the surface of AZ91 Mg alloy.After HCPEB treatment by 3,5 and 10 pulses,the AZ91 Mg alloy exhibited better corrosion resistance.However,the increasing amount of micro-cracks reduced the anti-corrosive properties of AZ91 Mg alloy as the pulse increased to 20 and 30.