Microstructure and corrosion properties of Mg-0.5Zn-0.2Ca-0.2Ce alloy with different processing conditions

• 作者: Cheng Zhang Liang Wu Guang-Sheng Huang Guan-Gang Wang Bin Jiang Fu-Sheng Pan
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 1924-1931
• 页数: 8页
• 语种: 英文

摘要

The microstructure and corrosion resistance of Mg-0.5Zn-0.2Ca-0.2Ce alloy with different processing conditions were investigated.The composition was detec-ted by X-ray fluorescence(XRF),and the microstructure was analyzed by optical microscopy(OM)and scanning electron microscope(SEM)equipped with energy-disper-sive spectroscopy(EDS).The corrosion behavior was investigated by hydrogen evolution tests,weight loss tests and electrochemical measurements.The Mg-0.5Zn-0.2Ca-0.2Ce alloy has much better corrosion resistance compared with the commercial AZ31 sheet,which can be attributed to its dispersive second phases and protective corrosion products film on the alloy surface.Moreover,the as-rolled Mg-0.5Zn-0.2Ca-0.2Ce alloy shows much better corrosion resistance compared with the as-extruded Mg-0.5Zn-0.2Ca-0.2Ce alloy.This can be due to three aspects:The as-rolled alloy has smaller grain size;the as-rolled alloy has lower(10(1)0)/(11(2)0)texture intensity;the residual stress of the as-rolled alloy is eliminated during the annealing process,but large residual stress exists in the as-extruded alloy produced by the extrusion process.