Abstract
In this study iron oxide (Fe3O4) incorporated hydroxyapatite (HA) and chitosan (CS) composite coatings were developed to enhance the corrosion resistance and surface properties of Ti–13Nb–13Zr alloy. Pure HA and composites with different percentage (1, 3 and 5%, wt%) of Fe3O4 have been fabricated by using the electrophoretic deposition method (EPD). The morphology of the composite coating indicated porous nature with average 10 ± 0.2 µm coating thickness, were examined by scanning electron microscopy (SEM). The wettability behavior and surface roughness values of the composite coatings were measured and discussed. The Electrochemical test was performed to evaluate the corrosion behavior in Ringer's solution. The HA-1wt% Fe3O4 composite coating exhibited the preeminent corrosion resistance with lowest Icorr and the highest Ecorr value as a contrast to HA-3wt% Fe3O4 and HA-5wt% Fe3O4 coatings. Additionally, in vitro bioactivity test were conducted in Ringer's solution for 7 days. It was found that the composite coating enhanced the apatite formation ability, which was further endorsed by SEM-EDX analysis. In conclusion, the composite HA-CS bioactive coating incorporated with Fe3O4 is proposed as a promising candidate for biomedical applications.
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