Corrosion properties of ECAP-processed Mg-Al-Ca-Mn alloys with separate Al2Ca and Mg2Ca phases

作     者：Shu-heng HE Ce WANG Chao SUN Yue ZHANG Kai YAN Jing-hua JIANG Jing BAI Feng XUE Huan LIU 何书恒;王策;孙超;张越;严凯;江静华;白晶;薛烽;刘欢

作者机构：College of Mechanics and MaterialsHohai UniversityNanjing 210000China School of Materials Science and EngineeringTianjin UniversityTianjin 300350China School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China School of Mechanical EngineeringYangzhou UniversityYangzhou 225127China Jiangsu Key Laboratory for Light Metal AlloysNanjing Yunhai Special Metals Co.Ltd.Nanjing 211200China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2022年第32卷第8期

页      面：2527-2540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：financial supports from the National Natural Science Foundation of China (Nos.51901068,51979099) the Key Research and Development Project of Jiangsu Province,China (No.BE2021027) the Opening Project of Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology,China (No.ASMA202102) the Research Fund from Key Laboratory for Light-weight Materials of Jiangsu Province,China 

主　　题：Mg-Al-Ca-Mn alloy equal channel angular pressing second phase refinement corrosion properties 

摘      要：To investigate the effect of separate Al_(2)Ca and Mg_(2)Ca phases on the corrosion properties of Mg−Al−Ca−Mn alloys,OM,SEM,immersion and electrochemical tests were conducted on the as-cast and ECAP Al_(2)Ca-containing(2Ca)and Mg_(2)Ca-containing(4Ca)*** the beginning of corrosion,the two as-cast alloys are corroded slowly compared with ECAP *** prolonging the corrosion time,the corrosion of ECAP alloys becomes slighter than that of as-cast alloys,which is mainly ascribed to the dispersion and refinement of the second phase in ECAP ***,the corrosion degree of 2Ca alloys is always slighter than that of 4Ca alloys,suggesting that Al_(2)Ca phase is more beneficial to the enhancement of corrosion resistance of Mg−Al−Ca−Mn based alloys than Mg_(2)Ca ***,based on the examinations of corrosion surface and electrochemical testing results,different corrosion mechanisms caused by the distributions and morphology of Al_(2)Ca and Mg_(2)Ca phases are discussed.