Chitosan/Hydroxyapatite coating of AZ91 Magnesium Alloy by using Electrophoretic Deposition

Abstract

Due to their good properties, including biodegradability and similar characteristics to natural bone, magnesium alloys have potential applications in implant manufacturing for biomedicine and orthopedics.In this study, chitosan or/and hydroxyapatite layers were performed on the surface of AZ91 magnesium alloy using electrophoretic deposition process. The surface microstructure of coating, mechanical properties, hydrogen evolution, pH and wettability were characterized with different techniques including scanning electron microscopy, vickers microhardness, immersion test and contact angle test. The results showed that, the coating layers were obtained can improve the corrosion resistance, mechanical properties, wettability making AZ91 a promising material to be used as a biodegradable alloy for biomedical applications.