Corrosion behaviour of hypereutectic Al-Si-Cu alloys used in cylinder liners
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2005
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SAE WORLD CONGRESS
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In this study, the corrosion resistance of four Al-Si
hypereutectic alloys has been investigated in a solution
of chemical composition typical of the condensed
solution from automotive fuel combustion products -
here named automotive synthetic condensed solution.
The significance of the undertaken study was in the
evaluation of materials used for cylinder liners
fabrication in relation to the Brazilian motor fuel. Three
commercial Al-Si alloys that have been used for cylinder
liners and a laboratory made alloy (Osprey Process)
were evaluated by electrochemical impedance
spectroscopy measurements at increasing times of
immersion in this solution. The surfaces of the alloys
were evaluated before and after corrosion test by
scanning electron microscopy and. Although the
corrosion mechanisms present similarities for all the
commercial alloys investigated, the results also indicated
different corrosion resistances for these alloys, and
these were related to their microstructure characteristics.
The laboratory prepared alloy showed increased
susceptibility to pitting corrosion comparatively to the
commercial alloys.
Como referenciar
SANTOS, H.O.; KUNIOSHI, C.T.; ROSSI, J.L.; COSTA, I.; REIS, F.M. Corrosion behaviour of hypereutectic Al-Si-Cu alloys used in cylinder liners. In: SAE WORLD CONGRESS, April 11-14, 2005, Detroit, Michigan. Proceedings... DOI: 10.4271/2005-01-0539. Disponível em: http://repositorio.ipen.br/handle/123456789/33003. Acesso em: 19 Apr 2024.
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