Corrosion behavior of Ti–13Nb–13Zr alloy used as a biomaterial

Titanium alloys were developed as an alternative to stainless steels and have been extensively used as biomaterials ever since. One of these alloys is Ti–13Nb–13Zr (TNZ), a near-beta phase alloy containing elements with excellent biocompatibility. The main advantage of the TNZ alloy, compared to oth...

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Bibliographic Details
Published in:Journal of alloys and compounds 2009-05, Vol.476 (1), p.172-175
Main Authors: Niemeyer, T.C., Grandini, C.R., Pinto, L.M.C., Angelo, A.C.D., Schneider, S.G.
Format: Article
Language:English
Subjects:
Applied sciences
Biological and medical sciences
Corrosion
Corrosion mechanisms
Corrosion tests
Exact sciences and technology
Gas–solid reactions
Medical sciences
Metals and alloys
Metals. Metallurgy
Oxidation
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
Technology. Biomaterials. Equipments. Material. Instrumentation
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Summary:Titanium alloys were developed as an alternative to stainless steels and have been extensively used as biomaterials ever since. One of these alloys is Ti–13Nb–13Zr (TNZ), a near-beta phase alloy containing elements with excellent biocompatibility. The main advantage of the TNZ alloy, compared to other titanium alloys, such as Ti–6Al–4V and Ti–6Al–7Nb, widely used as biomaterials, is its low elasticity modulus, closer to that of bone, and the absence of aluminum and vanadium, which have been reported to cause long-term adverse effects. In this paper, the corrosion and electrochemical behavior of TNZ alloy (as cast and after oxygen charge) was studied in a PBS solution. The results showed that, with the oxygen load, there is a significant reduction of the anodic current in almost the whole potential spam explored in this work, meaning that the corrosion rate decreases when the doping is performed.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2008.09.026