Surface Characteristics and Hydrophilicity of the as-Anodized Films Formed at High Current Density on Ti-6Al-4V in Different Electrolytes

Abstract:

Hydrophilicity of the as-anodized films is an important factor for improving the osseointegration of Ti implants and bone tissues. This study investigated the surface characteristics and the hydrophilicity of the as-anodized films formed on Ti-6Al-4V. The as-anodized films on Ti-6Al-4V were prepared using galvanostatic method in 1M H₃PO₄ or 1M MCPM as an electrolyte with different current densities (5, 20, 80 mA/cm²) and using potentiostatic method with different voltages (5, 100 and 150 V) for 30 minute at room temperature. The as-anodized films shows a significantly lower water contact angle compared to the untreated Ti-6Al-4V. The porous oxide films were fabricated on Ti-6Al-4V. Ti 2p spectra show that the as anodized films consist of TiO₂ and O 1s present hydroxide (OH^-) and adsorbed water (H₂O) that effect to the hydrophilicity on the as-anodized film surface. These results demonstrate that the galvanostatic method at a high current density of 20 mA/cm² and the potentiostatic at a high voltage of 150 V in MCPM could enhance both of the high surface roughness and appropriate surface species which is leading to good hydrophilicity on the as-anodized films.

• Periodical: Key Engineering Materials (Volume 608)
• Pages: 274-279
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.608.274
• Online since: April 2014
• Authors: Phanawan Whangdee, Sutthima Sriprasertsuk, Viritpon Srimaneepong, Dujreutai Pongkao Kashima*
• Keywords: Galvanostatic, High Current Density, Hydrophilicity, Potentiostatic, Ti6Al4V

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