Ca对Mg-8Zn-4Al镁合金显微组织和耐蚀性能的影响  

Effect of Ca on Microstructure and Corrosion Resistance of Mg-8Zn-4Al Alloy

作　　者：白志玲[1] 

机构地区：[1]六盘水师范学院,贵州六盘水553004

出　　处：《热加工工艺》2016年第8期66-69,共4页Hot Working Technology

基　　金：六盘水师范学院高层次人才科研启动基金(LPSSYKYJJ2014-17);贵州省科技厅联合基金项目(黔科合LH字[2014]7460号);贵州省普通高等学校煤系固体废弃物资源化技术创新团队(黔教合人才团队字[2014]46号)

摘　　要：研究了Ca对Mg-8Zn-4Al镁合金显微组织和耐蚀性能的影响。结果表明:Ca加入Mg-8Zn-4Al合金后,合金显微组织得到细化,τ-Mg_(32)(Al,Zn)_(49)相弥散分布,无新相形成。Ca元素的添加降低了Mg-8Zn-4Al合金的腐蚀速率和腐蚀电流密度,提高了合金的腐蚀电位,改善了合金的耐腐蚀性;当Ca含量为0.3%时,该合金的耐蚀性能最佳。The effects of Ca on the microstructure and corrosion resistance of Mg-8Zn-4A1 alloy were investigated. The results indicate that after adding Ca, the microstructure of Mg-8Zn-4Al alloy is refined, the τ-Mg32 （Al,Zn）49 phase distributes uniformly, no new phase is formed in Mg-8Zn-4Al alloy. When adding Ca into Mg-8Zn-4Al alloy, the corrosion rate and corrosion current density of the alloys reduce, the corrosion potential of the alloy is enhanced. The corrosion resistance of Mg-8Zn-4AI alloy improves with the addition of Ca. When the Ca content is 0.3%, the alloy has the best corrosion resistance.

关 键 词：CA Mg-8Zn-4Al 合金 显微组织 耐蚀性 

分 类 号：TG146.22[一般工业技术—材料科学与工程]