The results of X-ray diffraction(XRD)revealed a composite with high content of HA was fabricated at pH4.5, V¼20 V, and t¼15 min. The deposition mechanism at the initial and final times was significantly related to self-assembly of HA nanoparticles that chelated by cationicmacromolecularchainsandlocatedonBGmicroparticles,andCS-coatedparticulatesof
HA nanoparticles,respectively.Theresultsofpotentiodynamicpolarizationandelectrochemicalimpedancespectroscopystudiesdemonstrated
that theCS–BG–HA compositecoatingactsasabarrierlayerincorrectedsimulatedbody fluid (C-SBF).