Effect of fluoride ions on Ti6Al4V alloy passivation in lactated Ringer's serum

AUTOR(ES)

Schmidt, Anelise M., Azambuja, Denise S.

FONTE

Materials Research

DATA DE PUBLICAÇÃO

2003-06

RESUMO

The corrosive behavior of Ti and its alloys in fluoride media is well known. Based on electrochemical studies, this paper describes the effect of fluoride ions on the passive behavior of Ti6Al4V alloy in lactated Ringer's serum. The open circuit potential of the alloy in the serum, which lies in the passive region of TiO2, shifts to more negative values as fluoride ions are added. The voltammogram obtained in the serum presents an active-passive behavior close to -0.2 V (SCE) that changes with the presence of fluoride ions, evidencing higher anodic currents. Electrochemical impedance spectroscopy plots obtained at OCP after varying immersion times in the serum display an almost capacitive behavior and the polarization resistance becomes enhanced after 7 days. With the addition of fluoride ions, the film's resistance decreases, but a stable protective layer develops after 7 days of immersion time, indicating the film's repair.

Documentos Relacionados

• Effect of fluoride ions on Ti6Al14V alloy passivation in lactated ringer's serum
• Corrosion behavior of Ti and TI6Al4V in citrate buffers containing fluoride ions
• Effect of Etching Temperature on Surface Properties of Ti6Al4V Alloy for Use in Biomedical Applications
• Investigation on the Microstructure of Direct Laser Additive Manufactured Ti6Al4V Alloy
• Raman analyses of residual stress in diamond thin films grown on Ti6Al4V alloy