Formation Mechanism and Corrosion Properties of Bioactive Coating on a Micro-Arc Oxidized Ti6Al4V Using Cathodic Electrodeposition

A coating containing Ca and P was prepared on the surface of micro-arc oxidized titanium alloy by cathodic electrodeposition. The effects of deposition condition on the formation mechanisms and corrosion properties of the coatings were investigated. The results indicate that the deposition temperature, time and current density strongly affect the microstructure and corrosion properties of the coatings. CaHPO4 center dot 2H(2)O tends to form at lower temperatures and a short deposition time. Higher temperatures cause the formation of hydroxyapatite. Moreover, higher current densities and longer time promote the formation of Ca)(OH)(2). The coatings formed at higher temperatures with higher current densities obtain a good corrosion property. (C) 2017 The Electrochemical Society. All rights reserved.