| Abstract: | 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. |
