Biodegradable Zn-1wt.%Mg(-0.5wt.%Mn) Alloys: Influence of Solidification Microstructure on Their Corrosion Behavior

Autor(es)

Vida, Talita ; Cruz, Clarissa ; Barros, Andre ; Cheung, Noe ; Brito, Crystopher ; Garcia, Amauri

• Tipo de documento: Artigo Científico
• Fonte: SURFACES; v. 6, n. 3, p. 13-pg., 2023-09-01.

Resumo

The development of biodegradable Zn-based alloys for implants that effectively mimic the functionality of native bone throughout the healing process is a multifaceted challenge; this is particularly evident in the task of achieving appropriate corrosion rates. This work explores the incorporation of 0.5wt.%Mn into a Zn-1wt.%Mg alloy, with focus on the relationship between corrosion behavior and microstructure. Electrochemical corrosion tests were carried out in a 0.06 M NaCl solution using as-solidified samples with two distinct microstructural length scales. Mn addition was found to induce significant electrochemical active behavior. Localized corrosion was predominant in interdendritic regions, with the ternary alloy exhibiting a higher susceptibility. For both alloys, the coarsening of the microstructure promoted a slight inclination to accelerate the corrosion rates in both biodegradable Zn alloys. The corrosion rate showed an increase of about nine-times with Mn addition for coarser eutectic spacings, while for finer ones, the increase was by about 22 times. (AU)

• Processo FAPESP: 22/15696-0 - Avaliação do comportamento da tribocorrosão de ligas Zn-Mg-Cu e Zn-Mg-Sn para biomateriais
• Beneficiário: Crystopher Cardoso de Brito
• Modalidade de apoio: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 21/11439-0 - Inter-relações entre parâmetros térmicos/microestruturas de solidificação com resistência ao desgaste e geração de hidrogênio de ligas Al-Sn-(Mg;Zn)
• Beneficiário: Noe Cheung
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/50502-5 - Interrelation of thermal and microstructural solidification parameters and corrosion/tribocorrosion behavior of alloys for tribological, biomedical and solder applications
• Beneficiário: Amauri Garcia
• Modalidade de apoio: Auxílio à Pesquisa - Regular