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Belo Horizonte, Brazil

De Almeida L.H.,Federal University of Rio de Janeiro | Bastos I.N.,State University of Rio de Janeiro | Santos I.D.,Instituto Tecnologico Vale Vale S.A. | Dutra A.J.B.,Federal University of Rio de Janeiro | And 3 more authors.
Journal of Alloys and Compounds | Year: 2014

Metastable β-Ti alloys combine low elastic modulus, excellent mechanical strength as well as good corrosion resistance. Wherever, the presence of nontoxic elements such as Nb, Ta, Mo, and Zr is an important advantage. With such properties this type alloy has been developed for orthopedic applications. Previous studies had shown that the Ti-12Mo-13Nb and Ti-10Mo-20Nb alloys aged at 500 °C presented higher hardness/elastic modulus ratio compared to commercially Ti-6Al-4V, indicating a great potential for biomedical application. However, additional studies are needed such as corrosion resistance. Therefore, the objective of this work was to analyze the electrochemical behavior of the Ti-12Mo-13Nb and Ti-10Mo-20Nb alloys aged at 500 °C/24 h and 500 °C/4 h, respectively. The electrochemical behavior was carried through by potentiodynamic polarization curves in Ringer's solutions to simulate the body fluid. The Ti-10Mo-20Nb alloy showed to be more resistant to corrosion when compared to Ti-12Mo-13Nb alloy and the commercially Ti-6Al-4V alloy. © 2014 Elsevier B.V. All rights reserved.

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