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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Directionally solidified dilute Zn-Mg alloys: Correlation between microstructure and corrosion properties

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Autor(es):
Vida, Talita A. ; Conde, Ana ; Freitas, Emmanuelle S. ; Arenas, Maria A. ; Cheung, Noe ; Brito, Crystopher ; de Damborenea, Juan ; Garcia, Amauri
Número total de Autores: 8
Tipo de documento: Artigo Científico
Fonte: Journal of Alloys and Compounds; v. 723, p. 536-547, NOV 5 2017.
Citações Web of Science: 6
Resumo

ZinceMagnesium (Zn-Mg) alloys have been addressed as potential biodegradable biomaterials. These alloys enable to overcome the main drawbacks of Mg, its high corrosion rate and hydrogen evolution. Moreover, homogeneous corrosion degradation is also an interesting issue to ensure the success of load-bearing biodegradable implants. In this work, two directionally solidified dilute alloys, Zn-0.3wt-% Mg and Zn-0.5wt-%Mg were studied. Both alloys having different microstructural morphologies (cellular and dendritic arrays) depending of the distance to the cooling bottom were evaluated to correlate their microstructural features with corrosion properties. Kinetics and corrosion mechanism have been evaluated by means of DC and AC electrochemical techniques in low chloride containing solution, 0.06 M NaCl. Coarser microstructures are shown to promote higher corrosion rate. Like Zn the corrosion mechanism occurs throughout a multistep dissolution process involving the formation of intermediate monovalent Zn-I, and soluble zinc hydroxychloride compounds resulting of the reaction of zincate ions with chloride ions. (C) 2017 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 13/23396-7 - Efeitos de parâmetros da microestrutura de solidificação de ligas multicomponentes à base de alumínio (Al-Mg-Si; Al-Sn-Cu; Al-Zn-Mg) nas resistências à degradação por corrosão e tribocorrosão
Beneficiário:Amauri Garcia
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 13/15478-3 - Inter-relação entre Parâmetros Térmicos e Microestruturais da Solidificação e Comportamento Tribocorrosivo de Ligas Al-Zn(Mg) e Zn-Mg
Beneficiário:Emmanuelle Sá Freitas Feitosa
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
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
Linha de fomento: Auxílio à Pesquisa - Regular