Incorporation of LDH nanocontainers into plasma electrolytic oxidation coatings on Mg alloy  

作　　者：Yan Li Xiaopeng Lu Maria Serdechnova Carsten Blawert Mikhail L.Zheludkevich Kun Qian Tao Zhang Fuhui Wang 

机构地区：[1]Shenyang National Laboratory for Materials Science,Northeastern University,3-11 Wenhua Road,Shenyang 110819,China [2]Institute of Surface Science,Helmholtz-Zentrum Hereon,Geesthacht 21502,Germany [3]Institute of Materials Research,Faculty of Engineering,University of Kiel,Kaiserstraβe 2,Kiel 24143,Germany [4]School of Materials Science and Engineering,Southeastern University,Nanjing 211189,China

出　　处：《Journal of Magnesium and Alloys》2023年第4期1236-1246,共11页镁合金学报（英文）

基　　金：support from National Natural Science Foundation of China(No.52071067 and U1737102);Mobility Programme of the Sino-German Center(M-0056);the Fundamental Research Funds for the Central Universities(N2002009);FUNCOAT project(H2020-MSCA-RISE-2018,Grant Agreement N 823942).

摘　　要：In-situ incorporation of layered double hydroxides(LDH)nanocontainers into plasma electrolytic oxidation(PEO)coatings on AZ91 Mg alloy has been achieved in the present study.Fumarate was selected as Mg corrosion inhibitor for exchange and intercalation into the nanocontainers,which were subsequently incorporated into the coating.It was found that the thickness and compactness of the coatings were increased in the presence of LDH nanocontainers.The corrosion protection performance of the blank PEO,LDH containing PEO and inhibitor loaded coatings was evaluated by means of polarization test and electrochemical impedance spectroscopy(EIS).The degradation process and corrosion resistance of PEO coating were found to be greatly affected by the loaded inhibitor and nanocontainers by means of ion-exchange when corrosion occurs,leading to enhanced and stable corrosion resistance of the substrate.

关 键 词：MAGNESIUM Layered double hydroxides INHIBITOR Plasma electrolytic oxidation NANOCONTAINER 

分 类 号：TG174.4[金属学及工艺—金属表面处理]