Microstructure and in Vitro Corrosion Properties of ZK60 Magnesium Alloy Coated with Calcium Phosphate by Electrodeposition at Different Temperatures

摘要

Magnesium and its alloys have attracted more and more attentions due to their potential applications inbiodegradable implants. But the applications are limited by high corrosion rate of magnesium. In thispaper, CaP coatings were fabricated on the ZK60 magnesium alloys by a electrodeposition method.The coatings were composed of mainly DCPD phases with flake-like structure. SEM images show thatthe particle size and surface roughness in the coatings increase with increasing electrolyte temperatures.Electrochemical corrosion and in vitro immersion were conducted to evaluate the corrosion resistance.The corrosion resistance of the coated samples was greatly improved comparing with that of theuncoated sample. For the samples fabricated at different electrolyte temperatures, the sample coated ato 60 C has the best corrosion resistance.