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Title: Surface analysis and corrosion resistance of a new titanium base alloy in simulated body fluids
Authors: Vasilescu, C.
Drob, S. I.
Neacsu, E. I.
Mirza Rosca, J. C. 
Keywords: Ringers Lactate Solution
Electrochemical Corrosion
Impedance Spectroscopy
Ti-15Zr-4Nb-4Ta Alloy
Calcium-Phosphate, et al
Issue Date: 2012
Publisher: 0010-938X
Journal: Corrosion science 
Abstract: A new quaternary Ti-20Nb-10Zr-5Ta alloy with 3-near microstructure was obtained. Its native passive film composition and its modification and corrosion resistance after 2000 immersion hours in simulated biofluids were studied. The native film on the alloy surface contains TiO2, Nb2O5, ZrO2, Ta2O5 protective oxides as was demonstrated by XPS. After 2000 h, XPS revealed the presence of same oxides and calcium, phosphorous ions deposited from physiological solutions as hydroxyapatite. In Ringer and Ringer-Brown solutions, the new alloy presented low corrosion rates. Impedance data exhibited a passive film with two layers: an inner, barrier layer and an outer, porous layer. (C) 2012 Elsevier Ltd. All rights reserved.
ISSN: 0010-938X
DOI: 10.1016/j.corsci.2012.08.042
Source: Corrosion Science[ISSN 0010-938X],v. 65, p. 431-440
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