摘要
Highly oriented Mg-Al layered double hydroxide(LDHs)films were deposited on magnesium alloy AZ31 with different deformation processes by an easy in-situ growth method.The characteristics of the films were investigated by optical microscopy(OM),X-ray diffraction(XRD),scanning electron microscopy(SEM),and electrochemical,immersion and hydrogen evolution tests.The corrosion protection performance ranked the LDHs films as the increasing series:CS-LDHs(as-cast sample with LDHs)<AE-LDHs(asymmetric extrusion sample with LDHs)<SE-LDHs(symmetric extrusion sample with LDHs)<RS-LDHs(rolled sample with LDHs).A thicker and more compact LDH conversion coating was formed on the RS sample,and had the best corrosion protection performance.
基金
financially supported by the National Natural Science Foundation of China(Nos.51971040,51701029 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)。
