The effect of surface pretreatment on the corrosion behaviour of silanated AA2198‐T851 Al‐Cu‐Li alloy
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Surface and Interface Analysis
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The corrosion behaviour of silanated AA2198‐T851 alloy substrates with and with no
manufacturing‐process induced near‐surface deformed layer (MPI‐NSDL) has been
investigated. Two methods (alkaline etching + desmutting and mechanical polishing)
were employed in removing the MPI‐NSDL. Silanization was performed using 2‐bistriethoxysilylethane.
Electrochemical impedance spectroscopy (EIS), salt spray test,
and microscopy techniques were employed in the investigation of the corrosion
behaviours. The studies revealed that polishing appeared to be the best silanating
pre‐treatment (compared with degreasing and etching + desmutting) for the new generation
AA2198‐T851 Al‐Cu‐Li alloy, and this was reflected in the EIS spectra. The
etched + desmutted and the degreased surface with MPI‐NSDL did not respond well
to silanization and presented more pitting sites per square millimeter. However, the
severity of corrosion per pit was more on the polished sample compared with the
other two. Also, the corrosion mechanisms were different for the three cases.
Como referenciar
DONATUS, UYIME; KLUMPP, RAFAEL E.; MOGILI, NAGA V.V.; ANTUNES, RENATO A.; MILAGRE, MARIANA X.; COSTA, ISOLDA. The effect of surface pretreatment on the corrosion behaviour of silanated AA2198‐T851 Al‐Cu‐Li alloy. Surface and Interface Analysis, v. 51, n. 2, p. 275-289, 2019. DOI: 10.1002/sia.6584. Disponível em: http://repositorio.ipen.br/handle/123456789/30041. Acesso em: 24 Mar 2026.
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.