Abstract
The aim of this study is to develop a long-term corrosion-resistant, antibacterial, and bioactive TiO2/hydroxyapatite (HA) coating using a one-step plasma electrolytic oxidation (PEO) method. Magnesium and zinc-substituted HA particles were synthesized and utilized to create a composite coating that is corrosion-resistant, bioactive, and antibacterial. Prior to their use in the coating, the synthesized particles were characterized by XRD and FESEM. The results of polarization and electrochemical impedance spectroscopy (EIS) tests showed a significant increase in corrosion resistance. Moreover, the EIS results indicated an improvement in corrosion behavior after 168h, which was attributed to the formation of apatite in simulated body fluid (SBF). Additionally, a significant improvement in the bioactivity and antibacterial activity of the composite coatings was observed. Hence, the use of Mg, Zn-doped HA/TiO2 composite coatings could be a promising approach for developing bio-corrosion-resistant coatings for titanium biomaterials.Keywords: Plasma electrolytic oxidation, Hydroxyapatite, Corrosion, Electrochemical impedance spectroscopy, Biomaterials
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