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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.)

Electrochemical Corrosion Behavior of as-cast Zn-rich Zn-Mg Alloys in a 0.06M NaCl Solution

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Autor(es):
Vida, Talita A. ; Freitas, Emmanuelle S. ; Cheung, Noe ; Garcia, Amauri ; Osorio, Wislei R.
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: International Journal of Electrochemical Science; v. 12, n. 6, p. 5264-5283, JUN 2017.
Citações Web of Science: 4
Resumo

The electrochemical corrosion behavior of as-cast samples of Zn- 1.2 wt.% and Zn- 2.0 wt.% Mg alloys, solidified under similar cooling rates, is investigated in the present study. A stagnant and naturally aerated 0.06 M NaCl solution at 25 degrees C was used in the corrosion tests. In order to evaluate the corrosion resistance, electrochemical impedance spectroscopy (EIS) plots, potentiodynamic polarization curves and an equivalent circuit are used. It is found that the increase in the alloy Mg content (from 1.2wt.% to 2.0wt.%) refines both the Zn-rich dendritic matrix and the eutectic mixture and decreases the volume fraction of the Zn-rich phase. Consequently, this is shown to affect the cathode-to-anode area ratio, which decreases affecting the corrosion behavior. The experimental corrosion parameters demonstrated that the Mg content is associated with susceptibility to pitting corrosion. (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: 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