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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of Annealing Temperature on Corrosion Resistance of TiO(2)Nanotubes Grown on Ti-30Ta Alloy

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Author(s):
Capellato, Patricia [1] ; Sachs, Daniela [1] ; Vilela, Filipe Bueno [1] ; Melo, Mirian M. ; Silva, Gilbert [2] ; Rodrigues, Geovani [2] ; Zavaglia, Cecilia A. de C. [3] ; Nakazato, Roberto Z. [4] ; Claro, Ana Paula R. A. [4]
Total Authors: 9
Affiliation:
[1] Unifei Fed Univ Itajuba, Inst Chem & Phys, Ave BPS 1303, BR-37500903 Itajuba, MG - Brazil
[2] Unifei Fed Univ Itajuba, Inst Engn Mech, Ave BPS 1303, BR-37500903 Itajuba, MG - Brazil
[3] Unicamp State Univ Campinas, Fac Mech Engn, Rua Mendeleyev 200, BR-13083860 Sao Paulo - Brazil
[4] Unesp Sao Paulo State Univ, Dept Chem & Energy, Ave Ariberto Pereira da Cunha 333, BR-12516410 Guaratingueta, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: METALS; v. 10, n. 8 AUG 2020.
Web of Science Citations: 0
Abstract

With little success, researchers has been searching for alloys with elements such as tantalum to improve the long-term life of implants. The Ti-30Ta alloy presents an elastic modulus E = 69 GPa that is close to that of bone (E = 17-25 GPa) than Ti cp (E = 105 GPa). In addition, nanostructure surface modification influences cell behavior and antimicrobial activity. So, this study investigates the corrosion behavior of surface modification by TiO(2)nanotube grown on Ti-30Ta alloy after anodization process in the electrolyte glycerol + NH4F 0.25% at 30 V, for nine hours without annealing and annealed in 450 degrees C, 530 degrees C and 600 degrees C (5 degrees C/min). The electrochemical behavior was evaluated by three electrodes cell. The counter-electrode of graphite, reference-electrode of saturated calomel electrode and working-electrode at electrolyte of 0.15 M NaCl + 0.03 M NaF, with pH = 6 for 8000 s. The scanned region ranged from -0.8 V to values up to 3.5 V with a sweep rate 0.166 mV/s. Potentiodynamic polarization curves were obtained with a potentiostat. The sample was characterized by scanning electron microscopy (SEM) imaging, X-ray diffraction analysis (XRD) and wettability with a contact angle goniometer. We concludes from the obtained results that all treatment surfaces are hydrophilic (<90 degrees). The surface covered with TiO(2)nanotube crystallinity showed anatase phase after annealing at 450 degrees C, 530 degrees C and 600 degrees C; the exceptions were the anodized-without-annealing treatment and without-surface-modification alloys. The electrochemical behavior of the five groups investigated showed similar high resistance to corrosion solution under all conditions. (AU)

FAPESP's process: 14/14533-3 - Evaluation of PCL electrospun fibers on the Ti-30Ta alloy surface after TiO2 nanotubes growth
Grantee:Patricia Capellato
Support Opportunities: Scholarships in Brazil - Post-Doctoral