Doublely-doped Mg-Al-Ce-V_(2)O_(7)^(4-)LDH composite film on magnesium alloy AZ31 for anticorrosion  

作　　者：Liang Wu Xingxing Ding Zhicheng Zheng Aitao Tang Gen Zhang Andrej Atrens Fusheng Pan 

机构地区：[1]College of Materials Science and Engineering,Chongqing University,Chongqing,400044,China [2]National Engineering Research Center for Magnesium Alloys,Chongqing University,Chongqing,400044,China [3]School of Mechanical and Mining Engineering,The University of Queensland,Brisbane,Qld,4072,Australia

出　　处：《Journal of Materials Science & Technology》2021年第5期66-72,共7页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51971040);the Graduate Research and Innovation Foundation of Chongqing,China(No.CYS19002);the National Natural Science Foundation of China(Nos.51701029 and 51531002);the National Key Research and Development Program of China(No.2016YFB0301100);the China Postdoctoral Science Foundation Funded Project(Nos.2017M620410 and 2018T110942);the Chongqing Postdoctoral Scientific Research Foundation(No.Xm2017010);the Fundamental Research Funds for the Central Universities(No.2018CDGFCL005)。

摘　　要：A doublely-doped layered double hydroxide(LDH)film was produced on an anodized magnesium alloy AZ31.The Ce-doped Mg-Al LDH film was prepared by in-situ hydrothermal treatment method,and the intercalation of vanadate was realized by ion-exchange reaction.The structure,morphology and composition of as-prepared LDH film were investigated by X-ray diffractometer,field-emission scanning electronic microscope and energy dispersive spectrometry.Results indicated that a uniform and compact LDH film was formed and the intercalation of Ce^(3+)and vanadate would change the crystal structure of LDHs.The results of the potentiodynamic polarization,electrochemical impedance spectra,hydrogen evolution and corrosion weight loss tests showed the Ce^(3+)and vanadate anions significantly improve the impedance of LDH film,and the active double-doped LDH film could effectively protect the magnesium substrate from corrosion.

关 键 词：Magnesium alloy Doublely-doped LDH film VANADATE Cerium ANTICORROSION 

分 类 号：TG174.4[金属学及工艺—金属表面处理]