Gheorghe Asachi Technical University of Iasi, Faculty of Chemical Engineering and Environmental Protection, 71A D Mangeron Blvd, 700050 Iasi, Romania.
J Mater Sci Mater Med. 2010 Nov;21(11):2907-13. doi: 10.1007/s10856-010-4147-9. Epub 2010 Aug 15.
To evaluate the potential of β-Ti20Mo alloy as a dental material, we tested its corrosion behaviour in artificial saliva in comparison to that of cp-Ti. Open-circuit potential (E(OC)), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were used as electrochemical methods to characterize the corrosion behaviour of Ti20Mo alloy and cp-Ti, respectively. Corrosion current and passive current densities obtained from the polarization curves showed low values indicating a typical passive behaviour for Ti20Mo alloy. The EIS technique enabled us to study the nature of the passive film formed on the binary Ti20Mo alloy at various imposed potentials. The Bode phase spectra obtained for Ti20Mo alloy in artificial saliva exhibited two-time constants at higher potential (0.5 V, 1.0 V), indicating a two-layer structure. According to our experimental measurements, Ti20Mo alloy appears to possess superior corrosion resistance to that of cp-Ti in artificial saliva.
为了评估β-Ti20Mo 合金作为牙科材料的潜力，我们将其在人工唾液中的腐蚀行为与 cp-Ti 进行了比较。开路电位（E(OC)）、动电位极化和电化学阻抗谱（EIS）分别作为电化学方法来表征 Ti20Mo 合金和 cp-Ti 的腐蚀行为。从极化曲线获得的腐蚀电流和钝化电流密度表明，Ti20Mo 合金具有典型的钝化行为，其值较低。EIS 技术使我们能够研究在不同外加电位下形成的二元 Ti20Mo 合金上的钝化膜的性质。在人工唾液中，Ti20Mo 合金的 Bode 相位谱在较高电位（0.5V、1.0V）下表现出两个时间常数，表明存在两层结构。根据我们的实验测量，Ti20Mo 合金在人工唾液中的耐腐蚀性似乎优于 cp-Ti。
