Corrosion Performance of (Ha-Psz) Bio Ceramic Coated Ti-20Co Alloy in Simulated Physiological Media | ||
| Journal of Al-Nahrain University - Science | ||
| Article 1, Volume 14, Issue 1, March 2011, Pages 84-91 | ||
| Authors | ||
| Murtdha A. Alsaaidy; Thair L. Alzubaydi; Khalid R. Alrawi | ||
| Abstract | ||
| The present investigation provides experimental results of corrosion performance in simulatedbody fluid of Ti-20Co medical alloy coated with hydroxyapatite (HA) and Partially StabilizedZirconia (PSZ) composite layer by electrphoretic deposition (EPD) technique. A three mixing ratiosof HA and PSZ powders (namely 90%HA+10%PSZ, 66%HA+34%PSZ and 25%HA+75%PSZ)were electrophoretically deposited on the surface of a Ti-20Co substrates. Post heat treatment at800Co in inert environment was performed to improve the adhesion strength of the coated layers.The coated samples were subjected to electrochemical study in artificial saliva (Modified Carter'ssolution) and simulated blood plasma in order to determine the optimum coating conditions that cangive corrosion resistance in simulated body fluid condition. The influence of mixing ratios anddeposition thickness on the corrosion performance of the alloy are discussed in details based on theOpen Circuit Potential (OCP), corrosion potential and corrosion rate using potentiodynamicpolarization. Results showed that the coating efficiency is highly depending on parameters likecomposition, coating thickness, layer porosity and adhesion to substrate. The corrosion aspectsresulting from various deposition thicknesses are discussed in details. | ||
| Keywords | ||
| corrosion; Hydroxyapatite; Partially Stabilized Zirconia; Electrophoretic Deposition; Ti alloy | ||
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