Corrosion resistance improvement of additive manufactured scaffolds by anodizing

Author(s)

Longhitano, Guilherme Arthur ^{[1, 2, 3]} ; Conde, Ana ^[4] ; Arenas, Maria Angeles ^[4] ; Jardini, Andre Luiz ^{[1, 2]} ; de Carvalho Zavaglia, Cecilia Amelia ^{[1, 5]} ; Maciel Filho, Rubens ^{[1, 2]} ; Jose de Damborenea, Juan ^[4]

Affiliation

^[1] Natl Inst Biofabricat INCT BIOFABRIS, Campinas - Brazil

^[2] Univ Estadual Campinas, Sch Chem Engn, Campinas - Brazil

^[3] Ctr Informat Technol Renato Archer CTI, Campinas - Brazil

^[4] Ctr Nacl Invest Metalurg CENIM CSIC, Madrid - Spain

^[5] Univ Estadual Campinas, Sch Mech Engn, Campinas - Brazil

• Document type: Journal article
• Source: Electrochimica Acta; v. 366, JAN 10 2021.
• Web of Science Citations: 2

Abstract

Ti-6Al-4V ELI scaffolds produced by additive manufacturing and functionalized by anodizing technique in two different conditions have been evaluated using scanning electron microscopy, energy-dispersive X-ray spectroscopy, optical confocal microscopy, cyclic potentiodynamic polarization curves (CPP), and electrochemical impedance spectroscopy (EIS). Despite the differences in composition and morphological features between the anodic layers grown, the results revealed an improvement of the corrosion resistance in both anodized conditions regarding non-anodized samples. The non-anodized scaffolds presented pitting corrosion in phosphate-buffered saline solution at 37 degrees C. Conversely, the anodized samples prevented pitting corrosion and enhanced barrier properties by decreasing the passive current density in two orders of magnitude. EIS data show, anodized scaffolds presented good stability after 168 h of immersion time and better protective properties than non-anodized samples. (c) 2020 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 19/15441-9 - Advanced surface functionalizations aiming at corrosion and wear resistance and cell differentiation in Ti6Al4V ELI alloy customized mandibular prosthesis made by additive manufacturing
• Grantee: Cecilia Amelia de Carvalho Zavaglia
• Support Opportunities: Regular Research Grants
• FAPESP's process: 20/05612-8 - Development of customized mandible prosthesis produced by additive manufacturing and functionalized for local drug delivery
• Grantee: Guilherme Arthur Longhitano
• Support Opportunities: Scholarships in Brazil - Post-Doctoral