Exfoliation and intergranular corrosion resistance of the 2198 Al–Cu–Li alloy with different thermomechanical treatments
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2020
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Materials and Corrosion - Werkstoffe und Korrosion
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In this study, the resistance to exfoliation and intergranular corrosion (IGC) of
the 2198 Al–Cu–Li alloy submitted to different thermomechanical treatments
(T3, T8, and T851) was investigated. The tests were carried out following the
standard practices, ASTM G34‐18 and ASTM G110‐15, respectively. All the
tested alloys showed susceptibility to exfoliation and some alloys showed
susceptibility to IGC, but the artificially aged alloys presented a higher tendency
to exfoliation. The extensive hydrogen evolution reaction (HER) was
observed on the surfaces of artificially aged alloys when immersed in the
EXCO solution. The HER resulted in an increase in solution pH with the time
of immersion. Also, the weight losses related to the artificially aged alloys
were higher than that of the naturally aged ones. The T8 treatment was the
only condition that resulted in susceptibility to both, intergranular and
transgranular corrosion, whereas the T851 treatment did not show IGC
susceptibility, only transgranular corrosion. Finally, the 2198‐T3 condition
showed the highest corrosion resistance among the thermomechanical
treatments tested. The results of the 2198 alloy subjected to various treatments
were compared with that of the 2024‐T3 alloy. This last alloy showed higher
resistance to exfoliation and IGC as compared with the 2198 alloy.
Como referenciar
ARAUJO, JOAO V. de S.; MILAGRE, MARIANA X.; FERREIRA, RAPHAEL O.; MACHADO, CARULINE de S.C.; BUGARIN, ALINE de F.S.; MACHADO, IZABEL F.; COSTA, ISOLDA. Exfoliation and intergranular corrosion resistance of the 2198 Al–Cu–Li alloy with different thermomechanical treatments. Materials and Corrosion - Werkstoffe und Korrosion, v. 71, n. 12, p. 1957-1970, 2020. DOI: 10.1002/maco.202011839. Disponível em: http://200.136.52.105/handle/123456789/31658. Acesso em: 26 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.