Effect of surface treatments on the localized corrosion resistance of the AA2198‐T8 aluminum lithium alloy welded by FSW process
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2019
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Surface and Interface Analysis
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In this work, the effect of eight types of surface treatments on the corrosion resistance
of friction stir welded samples of an AA2198‐T8 Al‐Cu‐Li alloy were tested
and compared in an attempt to find suitable alternatives to toxic and carcinogenic
hexavalent chromium treatments. All the samples were anodized and subjected to different
post‐anodizing treatments. The post‐anodizing treatments were (1) hydrothermal
treatment in Ce (NO3)3 6H2O solution; (2) hydrothermal treatment in Ce (NO3)3
6H2O solution with H2O2; (3) hydrothermal treatment in boiling water; (4) hexavalent
chromium conversion coating; and (5) immersion in BTSE (bis‐1,2‐(triethoxysilyl)
ethane. The corrosion resistance of the treated samples was evaluated by immersion
tests in sodium chloride solution (0.1 mol L−1 NaCl) and electrochemical impedance
spectroscopy (EIS) of the friction stir weldment. The results showed that among the
alternative treatments, the Ce‐containing solutions presented the best corrosion
resistance, especially when used without peroxide.
Como referenciar
MACHADO, CARULINE de S.C.; KLUMPP, RAFAEL E.; AYUSSO, VICTOR H.; DONATUS, UYIME; MILAGRE, MARIANA X.; ARAUJO, JOAO V. de S.; MACHADO, GLAUSON A.F.; COSTA, ISOLDA. Effect of surface treatments on the localized corrosion resistance of the AA2198‐T8 aluminum lithium alloy welded by FSW process. Surface and Interface Analysis, v. 51, n. 12, p. 1231-1239, 2019. SI. DOI: 10.1002/sia.6622. Disponível em: http://repositorio.ipen.br/handle/123456789/30320. Acesso em: 17 May 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.