Preparation of calcium phosphate coatings on Mg-1.0Ca alloy

摘要

The calcium phosphate coatings were prepared by virtue of electrochemical deposition in order to improve the corrosion resistance of Mg-1.0Ca alloys in simulated body fluids.The chemical compositions,structures and morphologies of the coatings were investigated by energy dispersive spectroscopy（EDS）,X-ray diffractometry（XRD）and scanning electron microscopy（SEM）, respectively.The potentiodynamic electrochemical technique was employed to investigate the bio-degradation behavior of Mg-1.0Ca alloys with Ca-P coatings in Hank’s solutions.The experimental results show that the deposited coatings predominately consist of flake-shape brushite（DCPD,CaHPO4·2H2O）crystallites.The corrosion resistance of the substrates with coatings is improved in Hank’s solutions significantly.