钛阳极氧化纳米管在含氟环境中的腐蚀行为研究

Corrosion behavior of titanium with anodized oxidation nanotubesin oral environment with fluoride

目的研究钛阳极氧化前后在含氟环境中的腐蚀性能。方法采用阳极氧化法在钛表面制备TiO_2纳米管,分别采用人工唾液和含氟0.2%人工唾液模拟口腔实际情况,分析极化曲线获得腐蚀参数研究纯钛腐蚀性能变化规律。结果钛材料阳极氧化后形成管径为80 nm,管长为500 nm的纳米管结构。在含氟人工唾液中,纳米钛的破钝电位(1.7±0.06V)和自腐蚀电位(-544.7±24.5 mV)均高于光滑钛,差异有统计学意义(P<0.05),纳米钛的自腐蚀电流(4.5±0.9 mA/cm^2)和钝化区电流(10.3±2.3 u A)均低于光滑钛;差异有统计学意义(P<0.05)。结论钛阳极氧化后形成的TiO_2纳米管结构可以提高钛种植材料在含氟口腔环境中的抗腐蚀性能。

Objective To investigate the corrosion resistance of anodized oxidation flm on titanium in oral environment with fuoride.Methods TiO2 nanotube layer was prepared on Tiusing anodized methods.Polarization curves of titanium in acidic artificial saliva with 0.2% NaF was acquired by electrochemical methods.Results Titanium oxide nanotubes （80 nm diameter and 500 nm length） were examined on Ti surface after anodization. The self-corrosion potential and break-down potential of Nano-Ti were signifcantly higher than the smooth Ti. The self-corrosion current and passived current of Nano-Ti were significantly lowwer than the smooth Ti.Conclusion The resuIts of polarization curves indicate that titanium implants with TiO2 nanotubes are increased the corrosion resistancein oral environment with fuoride.