Study of Corrosion-Resistance on Biomedical Coating by Different Surface Treatments

Abstract:

The porous titanium alloy prepared by gel-casting methods was used as precursor and the composite coatings with hydroxyapatite HA/TiO₂ were prepared on the precursor which was treated by NaOH solution, H₂O₂ + NH₃ solution, HF+HNO₃, PdCl₂ solution to improve the capability of coatings. The microstructure was examined by SEM and the corrosion behavior of the coating layers in the simulated body fluids (SBF) was evaluated by potentiodynamic polarization test and impedance plots. The results show that the corrosion resistance of samples using PdCl₂ treatment is superior to else others. The PdCl₂ processing provides the substrate surface an excellent oxide film, which plays a key role in the corrosion resistance of coating. The thickness of the coatings is about 60μm and the surface morphologies are more uniform than the others and have no crack.

• Periodical: Applied Mechanics and Materials (Volume 563)
• Pages: 391-395
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.563.391
• Online since: May 2014
• Authors: Hui Ping Shao*, Sheng Jiang Wu, Tao Lin, Ran Wei
• Keywords: Corrosion Resistance, Electrophoretic Deposition (EPD), Hydroxyapatite (HA), Titanium Alloy

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