Role of Microalloyed Y and Gd in Improving the Corrosion Resistance of Rolled Mg-3Al-1Zn Alloy  

作　　者：Panpan Wang Haitao Jiang Yujiao Wang Yun Zhang Jingchao Tao 

机构地区：[1]Shanghai Key Laboratory of Materials Laser Processing and Modification,and National Engineering Research Center of Light Alloy Net Forming,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [2]Institute of Engineering Technology,University of Science and TechnologyBeijing,Beijing 100083,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2022年第6期941-947,共7页金属学报（英文版）

基　　金：financially supported by the Fundamental Research Funds for the Central Universities(No.FRF-IC-20-10);。

摘　　要：The corrosion performances of rolled AZ31 alloy with addition of Y and Gd were comparatively investigated. The corrosion rates of AZ31 alloy modified with Y and Gd were 3.3 and 3.7 mm/y immersing for 24 h in 3.5 wt% NaCl solution, respectively, which were much lower than that of AZ31 alloy(23.6 mm/y). The remarkable improvement in corrosion performance by adding Y or Gd was ascribed to preferentially form less noble Al_(2)Y or Al_(6)GdMn_(6) and more protective corrosion product layer, resulting in the reduction in H_(2) evolution rate and the enhancement of passivity.

关 键 词：AZ31 alloy Second phases Volta potential diff erence Y GD 

分 类 号：TG146.22[一般工业技术—材料科学与工程]