Improvement in corrosion resistance of Mg_(97)Zn_(1)Y_(2)alloy by Zr addition  

作　　者：Di-qing Wan Yu-meng Sun Yan-dan Xue Shao-yun Dong Guo-liang Han Yu Wang Fan Yang Hao Tang Yong-yong Wang 

机构地区：[1]School of Materials Science and Engineering,East China Jiaotong University,Nanchang 330013,China

出　　处：《China Foundry》2024年第6期634-640,共7页中国铸造（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(51665012);the Jiangxi Province Science Foundation for Outstanding Scholarship(20171BCB23061).

摘　　要：Magnesium alloys,known for their exceptional lightweight properties,have presented challenges in various applications due to their limited corrosion resistance.In this study,the corrosion resistance of Mg_(97)Zn_(1)Y_(2)magnesium alloys was enhanced by incorporating Zr elements into the Mg_(97)Zn_(1)Y_(2)matrix,which is distinguished by long periodic stacking ordered(LPSO)phases.Results show that Mg_(97)Zn_(1)Y_(2)-xwt.%Zr(x=0,0.1,0.3,0.6)alloys containing Zr exhibit reduced hydrogen evolution rates and decreased corrosion levels compared with that without Zr,when immersed in a 3.5wt.%NaCl solution.Addition of 0.3wt.%Zr results in the most significant improvement,with a corrosion rate as low as 2.261 mL·cm^(-2),representing an 86%reduction from 16.438 mL·cm^(-2)of the base alloy.Furthermore,alloys with Zr additions demonstrate a more positive corrosion potential and lower corrosion current density than does the matrix alloy(64.92μA·cm^(-2)).The lowest corrosion current density,21.61μA·cm^(-2),occurs with the addition of 0.3wt.%Zr.The introduction of Zr induces a change in the microstructure of the LPSO phases,increasing the charge transfer resistance within the alloy and thus effectively improving its corrosion resistance.

关 键 词：magnesium alloys ALLOYING corrosion resistance ZIRCONIUM 

分 类 号：TG146.22[一般工业技术—材料科学与工程]