Rodrigues A V, Oliveira N T C, dos Santos M L, Guastaldi A C
Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP Campus de Araraquara, Instituto de Química, Araraquara, SP, CEP 14800-900, Brazil.
J Mater Sci Mater Med. 2015 Jan;26(1):5323. doi: 10.1007/s10856-014-5323-0. Epub 2015 Jan 11.
The electrochemical behavior and corrosion resistance of Ti-15Mo alloy to applications as biomaterials in solutions 0.15 mol L(-1) Ringer, 0.15 mol L(-1) Ringer plus 0.036 mol L(-1) NaF and 0.036 mol L(-1) NaF (containing 1,500 ppm of fluoride ions, F(-)) were investigated using open-circuit potential, cyclic voltammetry, and electrochemical impedance spectroscopy techniques, X-ray photoelectron spectroscopy and scanning electron microscope. Corrosion resistance and electrochemical stability of the Ti-15Mo alloy decreased in solutions containing F(-) ions. In all cases, there were formation and growth of TiO2 and MoO3 (a protector film), not being observed pitting corrosion, which might enable Ti-15Mo alloys to be used as biomedical implant, at least in the studied conditions, since the electrochemical stability and corrosion resistance of the passive films formed are necessary conditions for osseointegration.
采用开路电位、循环伏安法、电化学阻抗谱技术、X射线光电子能谱和扫描电子显微镜，研究了Ti-15Mo合金在0.15 mol L(-1)林格氏液、0.15 mol L(-1)林格氏液加0.036 mol L(-1) NaF以及0.036 mol L(-1) NaF（含1500 ppm氟离子，F(-)）溶液中作为生物材料应用时的电化学行为和耐腐蚀性。在含F(-)离子的溶液中，Ti-15Mo合金的耐腐蚀性和电化学稳定性降低。在所有情况下，均形成并生长了TiO2和MoO3（一种保护膜），未观察到点蚀，这可能使Ti-15Mo合金能够用作生物医学植入物，至少在所研究的条件下如此，因为形成的钝化膜的电化学稳定性和耐腐蚀性是骨整合的必要条件。
