Publication Type:

Journal Article

Source:

Acta Biomaterialia, Volume 3, Number 6, p.1019 - 1023 (2007)

URL:

http://www.sciencedirect.com/science/article/pii/S1742706107000323

Keywords:

β Titanium; Corrosion; Polarization; Electrochemical impedance spectroscopy; Hanks solution

Abstract:

The electrochemical behaviour of β titanium alloys, namely Ti–15Mo (TiMo) and Ti–29Nb–13Ta–4.6Zr (TNTZ), were studied under physiological conditions using open circuit potential (OCP), potentiodynamic polarization and electrochemical impedance spectroscopic (EIS) measurements. The \{OCP\} data for \{TNTZ\} alloy indicated a noble behaviour compared to TiMo alloy. The current density value for \{TNTZ\} alloy calculated from polarization measurement was found to be comparable to that of TiMo. The \{EIS\} technique was applied to study the nature of the passive film formed on binary TiMo alloy at various impressed potentials and the results were compared with that of the quaternary \{TNTZ\} alloy. The \{EIS\} spectra obtained for TiMo alloy exhibited a single time constant for all potentials, indicating a highly compact passive layer over the surface. The \{TNTZ\} alloy, however, exhibited a single time constant at lower potentials and two time constants at higher potentials, indicating a bilayer structure at higher potentials.

Cite this Research Publication

Dr. Karthega M., Raman, V., and Rajendran, N., “Influence of potential on the electrochemical behaviour of β titanium alloys in Hank’s solution”, Acta Biomaterialia, vol. 3, pp. 1019 - 1023, 2007.

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