Microstructural and Electrochemical Characterization of Ti6Al4V Alloy

Wednesday, 8 October 2014: 08:20
Expo Center, 2nd Floor, Alfa Room (Moon Palace Resort)
J. F. Flores-Álvarez (Facultad de Quimica UNAM), F. J. Rodriguez-Gomez (Departamento de Ingeniería Metalúrgica. Facultad Química. UNAM), E. Onofre-Bustamante (Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada (CICATA)- IPN Unidad Altamira, Altamira Tamaulipas, México), and P. Roncagliolo Barrera (Departamento Ingeniería Metalúrgica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, México)
 The present work is an electrochemical study of Ti6Al4V alloy and TiO2 films obtained by thermal oxidation technique, and the use of cerium salt as a corrosion inhibitor. The electrochemical characterization was performed in phosphate-buffered saline (PBS) solution using the techniques of linear polarization and electrochemical impedance spectroscopy, and present phases’ characterization technique by scanning electron microscopy (SEM).

The protective capacity against corrosion of films using heat and cerium salt as corrosion inhibitor depends on the thickness of the oxide layer formed on the surface.

Blanks and thermally oxidized at 700 ° C for one hour and cooled in the oven for 24 hours samples, and  samples heat treated + chemical conversion treatment with cerium 0.01 M can be ranked as follows according to their anticorrosive capacity: Ti6Al4V alloy <Ti6Al4V sample heat treated at 700 ° C <Ti6Al4V sample thermally + chemical conversion treatment treated with 0.01M cerium.