Anisotropic corrosion behavior of hot-rolled Mg-8 wt.%Li alloy  

作　　者：Baojie Wang Kai Xu Daokui Xu Xiang Cai Yanxin Qiao Liyuan Sheng 

机构地区：[1]School of Environmental and Chemical Engineering,Shenyang Ligong University.Shenyang.110159,China [2]Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,China [3]School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang,212003,China [4]Peking University,Shenzhen Institute,Shenzhen Key Lab Human Tissue Regenerate Repair,Shenzhen,518057,China

出　　处：《Journal of Materials Science & Technology》2020年第18期102-111,共10页材料科学技术（英文版）

基　　金：financially supported by the National Key Research and Development Program of China under Grant(Nos.2017YFB0702001 and 2016YFB0301105);the Strategic New Industry Development Special Foundation of Shenzhen(No.JCYJ20170306141749970);the National Natural Science Foundation of China Projects under Grant(Nos.51871211 and 51701129);the Doctor Startup Fund of Natural Science Foundation Program of Liaoning Province(No.2019-BS-200);the funds of International Joint Laboratory for Light Alloys,Liaoning BaiQianWan Talents Program;the Domain Foundation of Equipment Advance Research of 13th Five-year Plan(No.61409220118);the Innovation Fund of Institute of Metal Research(IMR),Chinese Academy of Sciences(CAS);the National Basic Research Program of China(“973 Program”)(No.2013CB632205)。

摘　　要：By performing the immersion,hydrogen evolution and electrochemical corrosion testing in a 0.1 mol/L NaCl solution,the corrosion performance of differently oriented samples cut from an as-rolled Mg-8wt.%Li alloy plate has been investigated and compared.It demonstrated that obvious anisotropy in corrosion resistance existed between the sample surfaces with different orientations.Among them,the corrosion rate of"ND"(the normal direction)samples with their surfaces perpendicular to the normal direction of the plate was the highest.The corrosion rate of"TD"(the transverse direction)samples with their surfaces perpendicular to the transverse direction of the plate took the second place.For the"RD"(the rolling direction)samples with their surfaces perpendicular to the rolling direction of the plate,they had the lowest corrosion rate.For all the samples,their corrosion performance and the pitting severity were mainly ascribed to the crystallographic texture ofα-Mg matrix phases because the formed surface films onβ-Li phases could provide good protection to the substrate.For the"ND"and"TD"samples,the exposed surfaces were composed of{0002},{1010}and{1120}planes ofα-Mg phases and subsequently resulted in their severe corrosion attack due to the corrosion couples between basal and prism planes.Since the crystallographic planes of exposedα-Mg phases on the surfaces of"RD"samples were mainly{1010}and{1120}prism planes,the pitting severity was the weakest.

关 键 词：Mg-Li alloys Texture Anisotropic corrosion PITTING Crystallographic plane 

分 类 号：TG146.22[一般工业技术—材料科学与工程]