Influence of Grain Orientation on the Corrosion Behavior of Rolled AZ31 Magnesium Alloy

作     者：Yan-Chun Zhao Guang-Sheng Huang Guan-Gang Wang Ting-Zhuang Han Fu-Sheng Pan 

作者机构：State Key Laboratory of Mechanical TransmissionCollege of Materials Science and EngineeringChongqing University National Engineering Research Center for Magnesium AlloysChongqing University Chongqing Research Center for Advanced MaterialsChongqing Academy of Science and Technology 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2015年第28卷第11期

页      面：1387-1393页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by Fundamental Research Funds for the Central Universities(No. CDJZR14130009) Scientific and Technological Project of Chongqing Science and Technology Commission(No.CSTC2012GGB50003) Demonstrative Project of Chongqing Science and Technology Commission(No.CSCT2014FAZKTJCSF50004) 

主　　题：Magnesium alloys Corrosion behavior Electrochemical impedance spectroscopy Crystallographic orientation 

摘      要：The effect of the grain orientation on corrosion behavior of rolled AZ31 magnesium alloy is investigated in this study. The test samples have a similar surface roughness to the Mg alloy in practical application. The immersion test and electrochemical impedance spectroscopy show that the TD-ND planes dominated by （101-0）, （1120） and （1011） oriented grains show a higher corrosion resistance compared with these of the RD-TD planes which consist mainly of （0001） oriented grains. Here, RD, ND and TD represent the rolling direction, the normal direction and the transverse direction of the alloy sheet, respectively. The surface morphologies of the alloys at various immersion stages are observed by scanning electron microscopy, and the surface topography of the alloy substitutes is also observed by laser scanning confocal microscopy. The TD-ND planes show a regular corrosion along the TD direction, but the RD-TD plane shows an irregular corrosion.