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https://doi.org/10.37358/Rev.Chim.1949

OSIM Nr. R102355
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Revista de Chimie (Rev. Chim.), Year 2010, Volume 61, Issue 2,





ECATERINA VASILESCU, PAULA DROB, ION CINCA, MONICA POPA, CORA VASILESCU
Corrosion Resistance of a New Titanium Base Implant Alloy in Simulated Human Biofluid

Abstract:

A new Ti-10Zr-5Ta-5Nb alloy that contains only non-toxic elements was obtained and its anticorrosive resistance was studied in simulated physiological fluids (Ringer solution), in extreme functional conditions, namely acid, neutral and alkaline pH. The electrochemical techniques of potentiodynamic and linear polarization were used to characterize this behaviour. The open circuit potentials and the possible open circuit potential gradients that could appear due to the non-uniformity of Ringer solution pH were simulated, calculated and monitored for 750 h. Ti and Ti-10Zr-5Ta-5Nb alloy are both self-passivated in Ringer solutions. All electrochemical parameters are better for the alloy than for Ti, proving the beneficial effects of the alloying elements. Corrosion rates and ion release have lower values than those of Ti, describing the alloy as very stable. Open circuit potentials revealed more stable and more electropositive values for alloy than for base metal. Keywords: Ti-Zr-Ta-Nb alloy; non-toxic elements; corrosion rates; open circuit potential gradients


Issue: 2010, Volume 61, Issue 2
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