A comparison of corrosion inhibition of magnesium aluminum and zinc aluminum vanadate intercalated layered double hydroxides on magnesium alloys  

作　　者：Lian GUO Fen ZHANG Jun-Cai LU Rong-Chang ZENG Shuo-Qi LI Liang SONG Jian-Min ZENG 

机构地区：[1]College of Material Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China [2]School of Materials Science and Engineering, Guangxi University, Nanning 530004, China

出　　处：《Frontiers of Materials Science》2018年第2期198-206,共9页材料学前沿（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China （Grant Nos. 51601108, 51571134, 21676285）, the Natural Science Foundation of Shandong Province （Grant No. 2016ZRB01A62）, the SDUST Research Fund （No. 2014TDJH104）, and the Ministry-Province jointly-constructed cultivation base for the State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials, Guangxi Zhuang Autonomous Region.

摘　　要：The magnesium aluminum and zinc aluminum layered double hydroxides intercalated with NO3^- （MgAl-NO3-LDH and ZnAl-NO3-LDH） were prepared by the coprecipitation method, and the magnesium aluminum and the zinc aluminum layered double hydroxides intercalated with VO; （MgAl-VOx-LDH and ZnAl-VOx-LDH） were prepared by the anion-exchange method. Morphologies, microstructures and chemical compositions of LDHs were investigated by SEM, EDS, XRD, FTIR, Raman and TG analyses. The immersion tests were carried to determine the corrosion inhibition properties of MgAl-VOx-LDH and ZnAl-VOx-LDH on AZ31 Mg alloys. The results showed that ZnAl-VOx-LDH possesses the best anion-exchange and inhibition abilities. The influence of treatment parameters on microstructures of LDHs were discussed. Additionally, an inhibition mechanism for ZnAl-VOx-LDH on the AZ31 magnesium alloy was proposed and discussed.The magnesium aluminum and zinc aluminum layered double hydroxides intercalated with NO3^- （MgAl-NO3-LDH and ZnAl-NO3-LDH） were prepared by the coprecipitation method, and the magnesium aluminum and the zinc aluminum layered double hydroxides intercalated with VO; （MgAl-VOx-LDH and ZnAl-VOx-LDH） were prepared by the anion-exchange method. Morphologies, microstructures and chemical compositions of LDHs were investigated by SEM, EDS, XRD, FTIR, Raman and TG analyses. The immersion tests were carried to determine the corrosion inhibition properties of MgAl-VOx-LDH and ZnAl-VOx-LDH on AZ31 Mg alloys. The results showed that ZnAl-VOx-LDH possesses the best anion-exchange and inhibition abilities. The influence of treatment parameters on microstructures of LDHs were discussed. Additionally, an inhibition mechanism for ZnAl-VOx-LDH on the AZ31 magnesium alloy was proposed and discussed.

关 键 词：layered double hydroxides ANION-EXCHANGE thermal stability magnesium alloys inhibition 

分 类 号：TG174.42[金属学及工艺—金属表面处理] TM53[金属学及工艺—金属学]