Abstract

OLIVEIRA, Nilson T. C.  and  GUASTALDI, António C.. Electrochemical studies on Ti-Mo alloys of interest to biomaterials . Corros. Prot. Mater. [online]. 2007, vol.26, n.2, pp.46-52. ISSN 0870-1164.

Ti alloys are being developed to be used in orthopedic implants due their mechanical properties, biocompatibility and corrosion resistance. At this paper are reported electrochemical studies on the as-cast Ti-Mo alloys with 6, 10 and 20 Mo (wt.%), in 0.15 mol/L Na₂SO₄ solution and Ringer physiological solution. Analyses of the rest-potential indicated that all alloys present the same tendency to a spontaneous passivation, while cyclic voltammograms showed not transpassivation up to potentials of 8,0 V (vs ECS), indicating high corrosion resistance. The comparison among open-circuit profiles of the anodic oxides growth in Ringer and Na₂SO₄ solutions, are showing that the presence of chloride ions during the anodization is not influencing the oxides chemical stability.

Keywords : Ti-Mo alloys; Corrosion; Biomaterials; Implants.

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