Corrosion resistance improvement of additive manufactured scaffolds by anodizing

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Electrochimica Acta; v. 366, JAN 10 2021.
• Citações Web of Science: 2

Resumo

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)

• Processo FAPESP: 19/15441-9 - Funcionalizações superficiais avançadas visando a resistência à corrosão e ao desgaste e a diferenciação celular na liga Ti6Al4V ELI para fabricação de próteses customizadas de mandíbula por manufatura aditiva
• Beneficiário: Cecilia Amelia de Carvalho Zavaglia
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 20/05612-8 - Desenvolvimento de prótese customizada de mandíbula produzida por manufatura aditiva e funcionalizada para entrega de fármacos in situ
• Beneficiário: Guilherme Arthur Longhitano
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado