抄録
Physiological environments are severe corrosive conditions for the metallic biomaterials. The objective of this study was to characterize the corrosion behavior of carbon ion implantation (CII) which is a process originally developed for the fabrication of diamond-like carbon. The corrosion behaviors were examined using the potentiodynamic anodic polarization measurement in deaerated 0.9% sodium chloride solution at 37°C according to the Japanese Industrial Standards (JIS) T-0302. CII was applied to titanium alloy substrates by plasma source ion implantation. Polarization curves showed that the CII-treated surfaces kept lower current densities than the untreated titanium alloy under the biological condition (−0.5V∼+0.5V). The corrosion behaviors of CII-3hr and CII-4hr were similar, but CII-3hr showed pitting corrosion at around 2.7 V. CII surface engineering can be considered as beneficial for improving the corrosion resistance of titanium alloy in the physiological environment.
