热处理对Mg-3Sn-2Al-1Zn-5Li合金耐蚀性能的影响  

Effect of Heat Treatment on Corrosion Resistance of Mg-3Sn-2Al-1Zn-5Li Alloy

作　　者：孙绪军[1] 杨旭光 戴益波 郭宇航[2] SUN Xujun;YANG Xuguang;DAI Yibo;GUO Yuhang(School of Medicine and Chemical Engineering,Lianyungang Technical College,Lianyungang 222000,China;School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]连云港职业技术学院医药与化学工程学院,连云港222000 [2]江苏科技大学材料科学与工程学院,镇江212003

出　　处：《腐蚀与防护》2024年第5期40-43,共4页Corrosion & Protection

基　　金：江苏科技大学博士科研启动项目(1062932101);连云港职业技术学院新材料研究中心资助项目(2107051001)。

摘　　要：对Mg-3Sn-2Al-1Zn-5Li合金进行了不同方式的热处理。利用电化学测试研究了不同热处理状态合金在3.5%NaCl溶液中的腐蚀电化学行为,并通过扫描电镜、能谱以及X射线衍射分析了合金腐蚀形貌及腐蚀产物的成分。结果表明:经固溶处理和时效处理后,合金的耐蚀性能有所提高,并且固溶态的Mg-3Sn-2Al-1Zn-5Li合金有着最佳的耐蚀性能;合金的腐蚀特征为丝状腐蚀,腐蚀产物主要为Mg(OH)_(2)。The Mg-3Sn-2Al-1Zn-5Li alloy was heat treated in different ways.The corrosion electrochemical behavior of the heat-treated alloy by different ways was studied by electrochemical testing in 3.5%NaCl solution.The corrosion morphology and the composition of corrosion products were analyzed by scanning electron microscopy,energy spectrum and X-ray diffraction.The results show that the corrosion resistance of the alloy was improved after solution and aging treatment,and the solution-treated Mg-3Sn-2Al-1Zn-5Li alloy had the best corrosion resistance.The corrosion characteristic of the alloy was filiform corrosion,and the main corrosion product was Mg(OH)2.

关 键 词：Mg-3Sn-2Al-1Zn-5Li合金 热处理 电化学分析 腐蚀形貌 

分 类 号：TG174[金属学及工艺—金属表面处理]