Preparation and Characterization of Mg–Zn–Al LDHs Nanoplates via In Situ Growth on Mg–Zn–Zr–Sr Alloy

Magnesium (Mg) and its alloy have been regarded as revolutionary bioabsorbable materials. However, high corrosion activity limits their applications as biomaterials. To improve the corrosion resistance and in vitro degradation of Mg–Zn–Zr–Sr alloy (MZZS), Mg–Al hydrotalcite (LDHs) was fabricated through in situ growing approach by hydrothermal treatment. The characteristics of the coatings were investigated using SEM, XRD, FT-IR and EDS. The corrosion resistance of the LDH coatings was also studied using potentiodynamic polarization and hydrogen evolution test. The results demonstrated that the LDHs coatings exhibited a promising application of improving corrosion resistance and degradability in vitro.