An oxygen diffusion layer (ODL) was produced on a commercially pure titanium (CP-Ti) using atmospheric thermal oxidation at a temperature of 850 °C for 36 h. The ODL was then electrochemically anodized in a 1 M sulfuric acid solution at various voltages of 100, 150 and 175 V. SEM images showed a non-uniform anodized titanium oxide layer due to insufficient potential driving force under a voltage of 100 V. A uniform porous layer containing anatase and rutile phases was formed at an anodizing voltage of 150 V, however, rutile was the only constituent of the layer formed under a higher voltage of 175 V. A hardness of 330–430 HV was obtained for the anodized layers compared with 200 and 1200 HV for CP-Ti and the ODL, respectively. However, the cell viability assay and cell adhesion results indicated an improved biocompatibility of the anodized top layer compared with the ODL and CP-Ti. Furthermore, polarization curves obtained in the PBS solution showed that the top anodized layer led to a lower corrosion current density by more than one order of magnitude compared with the ODL and CP-Ti. In addition, tribocorrosion experiments were conducted in PBS solution under a normal load of 1.5 N under various sliding distances of 25–300 m. The results showed a remarkable improvement of tribocorrosion resistance for the ODL and anodized layers compared with CP-Ti.

在大气纯氧化条件下，在850°C的温度下进行36小时，在商业纯钛（CP-Ti）上制备了氧气扩散层（ODL）。然后，将ODL在1 M硫酸溶液中以100、150和175 V的各种电压进行电化学阳极氧化。SEM图像显示，由于在100 V电压下驱动力不足，阳极氧化钛层不均匀。在150 V的阳极氧化电压下形成了包含锐钛矿相和金红石相的多孔层，但是，金红石是在175 V较高的电压下形成的层的唯一组成部分。与之相比，阳极氧化层的硬度为330-430 HV CP-Ti和ODL分别具有200和1200 HV的电压。然而，细胞活力测定和细胞粘附结果表明，与ODL和CP-Ti相比，阳极氧化顶层的生物相容性得到改善。此外，在PBS溶液中获得的极化曲线表明，与ODL和CP-Ti相比，顶部阳极氧化层导致的腐蚀电流密度降低了一个数量级以上。另外，在PBS溶液中以1.5 N的正常载荷在25–300 m的各种滑动距离下进行了摩擦腐蚀实验。结果表明，与CP-Ti相比，ODL和阳极氧化层的耐摩擦腐蚀性能有了显着提高。在PBS溶液中获得的极化曲线表明，与ODL和CP-Ti相比，顶部阳极氧化层导致的腐蚀电流密度降低了一个数量级以上。另外，在PBS溶液中以1.5 N的正常载荷在25–300 m的各种滑动距离下进行了摩擦腐蚀实验。结果表明，与CP-Ti相比，ODL和阳极氧化层的耐摩擦腐蚀性能有了显着提高。在PBS溶液中获得的极化曲线表明，与ODL和CP-Ti相比，顶部阳极氧化层导致的腐蚀电流密度降低了一个数量级以上。此外，摩擦腐蚀实验是在PBS溶液中以1.5 N的正常载荷在25-300 m的各种滑动距离下进行的。结果表明，与CP-Ti相比，ODL和阳极氧化层的耐摩擦腐蚀性能有了显着提高。