In situ impedance spectroscopy study of the electrochemical corrosion of Ti and Ti-6Al-4V in simulated body fluid at 25 degrees C and 37 degrees C

The corrosion resistance of Ti and Ti-6Al-4V was investigated through electrochemical impedance spectroscopy, EIS, potentiodynamic polarisation curves and UV-Vis spectrophotometry. The tests were done in Hank solution at 25 degrees C and 37 degrees C. The EIS measurements were done at the open circuit potential at specific immersion times. An increase of the resistance as a function of the immersion time was observed, for Ti (at 25 degrees C and 37 degrees C), and for Ti-6Al-4V (at 25 degrees C), which was interpreted as the formation and growth of a passive film on the metallic surfaces. (C) 2009 Elsevier Ltd. All rights reserved.

Financiadora de Estudos e Projetos (FINEP)

FINEP[01.06.0243.00]

FAPEMIG[CDS 12/03]

Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)

FAPEMIG[CEX 1736/06]

Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)

CNPq[520178/2006-8]

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)