To increase the longevity and to optimize the performance of biomedical implants, a class of β-titanium alloys, specifically Ti-Nb-Zr (TNZ) is being explored. TNZ alloys demonstrate advantageous properties including non-toxicity, biocompatibility and low elastic moduli. Moreover, previous studies have shown that the addition of trace amounts of boron (0.01- 1 wt%) in conventional titanium alloys increases the tensile strength and corrosion resistance of the alloys. The objective of this study was to investigate the corrosion behavior of UNS R58130 (Ti-13Nb-13Zr or Ti1313) as well as Ti-13Nb-13Zr with 0.01, 0.1 to 1 wt% boron additions. Materials were characterized using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The electrochemical characterization was carried out in accordance with the ASTM standards: modified ASTM F2129-19a and ASTM G59-97. It was found that a trace amount of 0.01 B addition siginificantly improved the corrosion resistance of Ti1313.

Subject
Materials, Corrosion resistant alloys, Corrosion currents, Boron, Density, Corrosion behavior, Titanium, Corrosion resistance, Titanium alloys, Alloys, Linear polarization resistance, Corrosion potential, Potentiodynamic polarization
Keywords:
knee implant, corrosion, TNZ, boron, biomedical
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2020
Association for Materials Protection and Performance (AMPP)
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