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.
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)。
