Microgalvanic Corrosion of Mg–Ca and Mg–Al–Ca Alloys in NaCl and Na(2)SO(4) Solutions

As a kind of potential biomedical material, Mg–Ca alloy has attracted much attention. However, the role of Ca-containing intermetallics in microgalvanic corrosion is still controversial. In 0.6 mol/L NaCl and Na(2)SO(4) solutions, the microgalvanic corrosion behavior of the second phase and Mg matri...

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Detalles Bibliográficos
Autores principales: Yang, Peixu, Ye, Songbo, Feng, Baojing, Liu, Jinhui, Huang, Sensen, Liu, Guonan, Zhang, Weidong, Tang, Weineng, Zhu, Shijie, Zhang, Shaojun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658488/
https://www.ncbi.nlm.nih.gov/pubmed/34885294
http://dx.doi.org/10.3390/ma14237140
Descripción
Sumario:As a kind of potential biomedical material, Mg–Ca alloy has attracted much attention. However, the role of Ca-containing intermetallics in microgalvanic corrosion is still controversial. In 0.6 mol/L NaCl and Na(2)SO(4) solutions, the microgalvanic corrosion behavior of the second phase and Mg matrix of Mg–Ca and Mg–Al–Ca alloys was examined. It was confirmed that the Mg(2)Ca phase acts as a microanode in microgalvanic corrosion in both NaCl and Na(2)SO(4) solutions, with the Mg matrix acting as the cathode and the Al(2)Ca phase acting as the microcathode to accelerate corrosion of the adjacent Mg matrix. It was also found that Cl(−) and SO(4)(2−) have different sensibilities to microgalvanic corrosion.

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