| 12419628 |
Huang HH: Effect of fluoride and albumin concentration on the corrosion behavior of Ti-6Al-4V alloy. Biomaterials. 2003 Jan;24(2):275-82.
The purpose of this study was to investigate the effect of fluoride and albumin concentration on the corrosion behavior of Ti-6Al-4V alloy in acid artificial saliva (pH 5/37 degrees C) using potentiodynamic polarization and linear polarization test. Chemical analyses of the surface passive film were characterized using X-ray photoelectron spectroscopy. The results showed that either the NaF (0-0.5%) or the presence of albumin (0-0.2%) in 0.1% NaF-containing media had a significant influence on the corrosion potential (E (corr)), corrosion rate (I (corr)), passive current density (I (pass)), and polarization resistance (R (p)) (p <0.01). The I (corr) and I (pass) values increased on increasing the NaF concentration, but decreased with the presence of albumin in NaF-containing media. The R (p) value decreased on increasing the NaF concentration, but increased with the presence of albumin in NaF-containing media. When the NaF concentration was higher than 0.1%, the protectiveness of TiO (2) passive film formed on Ti-6Al-4V alloy was destroyed by fluoride ions, leading to the formation of Na (2) TiF (6). The presence of albumin, regardless of the concentration, in 0.1% NaF-containing acid media improved the corrosion resistance of Ti-6Al-4V alloy. |
6(0,0,0,6) |