Abstract
A novel and bifunctional hafnium/poly (l, l-lactide) duplex coating (Hf/PLLA) was fabricated on magnesium alloy via magnetron sputtering coupled with dip-coating method. Microstructure, composition, in vitro degradation and cytocompatibility of coating were examined systematically. The in vitro electrochemical tests revealed that the Hf/PLLA duplex coating has significantly suppressed the degradation of magnesium alloy with the low corrosion current density of 0.02 μA/cm2 and high corrosion resistance of 324.5 KΩ cm2. Simultaneously, the cytocompatibility of magnesium alloy was further improved, as observed by the superior cell adhesion and proliferation of human osteoblast-like MG63 cells on the duplex coating.
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