Macroscopic Studies on the Properties of the Anodic Oxide Films on Titanium

J Mater Sci Technol ›› 1998, Vol. 14 ›› Issue (3): 241-246.

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Macroscopic Studies on the Properties of the Anodic Oxide Films on Titanium

G.A.EL-Mahdy (Chemistry Dept., Faculty of Science, Helwan University, Helwan, Cairo, EgyptS-S.MahmoudChemistry Dept., University College for Women, Ain-Shams University, Helopolis, Cairo, Egypt)

Received:1998-05-28 Revised:1998-05-28 Online:1998-05-28 Published:2009-10-10

Abstract

Abstract: The effect of fluoride ions on the formation and dissolution behaviour of anodic oxide films on Ti has been investigated in acidic fluoride media (pH=1) using impedance and galvanostatic techniques. A5 the fluoride ion concentration and temperature increase the rate of oxide film formation decreases while the dissolution process increases. oxide film formed at high tem-perature and formation voltage was found to contain more defect sites in the film than that formed at a lower one. Activation energies are calculated during the oxide film formation and dissolution and found to be 20.76 and 28.72 kJ/mol, respectively. Formation rate and reciprocal capacitance data are reported as a function of polarizing current density. Values are recorded for the electrolytic parameters A and B. Potentiostatic curves are derived from the galvanostatic results.

G.A.EL-Mahdy (Chemistry Dept., Faculty of Science, Helwan University, Helwan, Cairo, EgyptS-S.MahmoudChemistry Dept., University College for Women, Ain-Shams University, Helopolis, Cairo, Egypt). Macroscopic Studies on the Properties of the Anodic Oxide Films on Titanium[J]. J Mater Sci Technol, 1998, 14(3): 241-246.

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Macroscopic Studies on the Properties of the Anodic Oxide Films on Titanium

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