The corrosion behaviour of Pt modified TiO2 biomaterials in vitro conditions


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DOĞRU MERT B. , GÜNDÜZ S., İŞLER Ö., YAZICI B.

1st International Mediterranean Science and Engineering Congress (IMSEC 2016), Adana, Türkiye, 26 - 28 Ekim 2016, ss.911-916

  • Basıldığı Şehir: Adana
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.911-916

Özet

Titanium and its alloys have been widely used for biomedical applications due to high biocompatibility, osseointegration and corrosion behaviour.  Therefore, investigation and enhancing the corrosion behavior of these materials have vital importance. In this study, the corrosion performance of Ti enhanced via anodizing and Pt deposition, and we investigated the biomedical application of this modified Ti (Ti/TiO2-Pt) in vitro conditions. In anodizing procedure, titanium oxide (TiO2) layer was occurred on Ti surface at 17.5 V during different anodizing times in 0.1 M HF solution. Then Pt deposited on Ti/TiO2 by galvanostatically (100 mg Pt per cm-2). The biocompatibility and corrosion behaviour of Ti, Ti/TiO2 and Ti/TiO2-Pt were investigated with the help of cyclic voltammetry, and polarization measurements in physiological saline solution at 310 K. The surface morphologies were determined with surface photographs and scanning electron microscopy (SEM) images, furthermore the contact angles of bare and modified surface were investigated. The corrosion rate was determined during long immersion period. Results showed that the anodizing process and Pt deposition procedures increased the corrosion resistance of Ti. The lower anodic current density, contact angles and higher corrosion resistance were determined for Ti/TiO2-Pt. This is illustrated with the produced more stable, compact film on the surface.

 

Keywords: Biocompatibility; anodizing; physiological saline; corrosion