Correlation between microstructure and corrosion behaviour of Bi-Zn solder alloys
Rudimylla S. Septimio, Maria A. Arenas, Ana Conde, Amauri Garcia, Noe Cheung, Juan de Damborenea
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Agradecimentos: The authors are grateful to CAPES – Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (Finance Code 001- grant: 88881.135396/2016-01), CNPq – National Council for Scientific and Technological Development (grant: 408576/2016-2) and FAPESP – São Paulo Research...
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Agradecimentos: The authors are grateful to CAPES – Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (Finance Code 001- grant: 88881.135396/2016-01), CNPq – National Council for Scientific and Technological Development (grant: 408576/2016-2) and FAPESP – São Paulo Research Foundation (grants: 2017/15158-0 and 2017/16058-9), for their financial support
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Bi-Zn solder alloys with different Zn contents (1.5, 2.7 and 5wt-%) were prepared by casting and the correlation between the microstructure and corrosion behaviour by mean of direct current electrochemical tests was studied. The surface analysis of the hypoeutectic Bi-Zn alloy samples revealed the...
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Bi-Zn solder alloys with different Zn contents (1.5, 2.7 and 5wt-%) were prepared by casting and the correlation between the microstructure and corrosion behaviour by mean of direct current electrochemical tests was studied. The surface analysis of the hypoeutectic Bi-Zn alloy samples revealed the presence of needle-like ZnO and very small agglomerated spherical particles. By contrast, eutectic alloy presented the formation of a uniform and compact film of ZnO, which is related to the better distribution of Zinc in the Bi-rich matrix. Despite the increase in Zn content compared to the hypoeutectic alloy, the corrosion rate showed similar values regardless of its content in the alloy. The Bi-5wt-% Zn alloy presented the highest limiting current density, and consequently, the highest degree of corrosion of the studied alloys. The pro-eutectic phase consisting of large and thick Zn fibres is preferentially dissolved, promoting a selective attack that penetrates inside the sample
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
408576/2016-2
COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES
88881.135396/2016-01
FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2017/15158-0; 2017/16058-9
Fechado
Correlation between microstructure and corrosion behaviour of Bi-Zn solder alloys
Rudimylla S. Septimio, Maria A. Arenas, Ana Conde, Amauri Garcia, Noe Cheung, Juan de Damborenea
Correlation between microstructure and corrosion behaviour of Bi-Zn solder alloys
Rudimylla S. Septimio, Maria A. Arenas, Ana Conde, Amauri Garcia, Noe Cheung, Juan de Damborenea
Fontes
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Corrosion engineering, science and technology Vol. 54, no. 4 (May, 2019), p. 362-368 |