Porous anodic oxides on titanium and on a Ti–W alloy

The growth of a nanoporous anodic oxide on titanium and a Ti–20 at.% W alloy, both deposited by magnetron sputtering, in a glycerol/phosphate electrolyte at 453 K is reported. The oxide formed on titanium is a mixture of amorphous titania and anatase. However, that on the alloy is amorphous only and...

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Bibliographic Details
Published in:Corrosion science 2008-02, Vol.50 (2), p.548-553
Main Authors: Lu, Q., Alberch, J., Hashimoto, T., Garcia-Vergara, S.J., Habazaki, H., Skeldon, P., Thompson, G.E.
Format: Article
Language:English
Subjects:
A. Titanium
Applied sciences
C. Anodic films
C. Anodizing
Corrosion
Corrosion environments
Exact sciences and technology
Metals. Metallurgy
Other surface treatments
Production techniques
Surface treatment
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Summary:The growth of a nanoporous anodic oxide on titanium and a Ti–20 at.% W alloy, both deposited by magnetron sputtering, in a glycerol/phosphate electrolyte at 453 K is reported. The oxide formed on titanium is a mixture of amorphous titania and anatase. However, that on the alloy is amorphous only and forms at increased efficiency, about 27%. The amorphous structure is considered to be stabilized by incorporated units of WO 3, which are distributed uniformly throughout the anodic film. The growth of the porous oxides is suggested to be associated with loss of film species at the film/electrolyte interface at the base of pores, with new oxide forming exclusively at the metal/film interface by inward migration of O 2− ions.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2007.07.011