Corrosion protection of AA2524-T3 anodized in tartaric-sulfuric acid bath and protected with hybrid sol-gel coating
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2016
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Key Engineering Materials
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Resumo
2xxx Al alloys are particularly sensitive to localized corrosion in chloride environments
and in order to maintain their integrity, minimize maintenance needs and repairs, and to maximize
component life, protective treatments are required.
Anodizing is an electrochemical process based on the growth of the Al oxide layer by applying
anodic potentials. One of the alternatives is tartaric/sulphuric acid (TSA) anodizing, which is
environmentally compliant and provides corrosion resistance properties, compatible with the
requirements of the aerospace industry with appropriate paint adhesion.
In this study, AA2524-T3 specimens were anodized in a tartaric-sulfuric acid bath (TSA) and
subsequently protected by application of a hybrid sol–gel coating. The sol–gel coating was prepared
using a solution with high water content (58 %v/v) and obtained by the hydrolysis and condensation
of tetraethoxysilane (TEOS) and 3-glycidoxypropyltrimethoxysilane (GPTMS). The corrosion
resistance evaluation of both unsealed and coated samples was carried out in a sodium chloride
solution by EIS as a function of immersion time. The results were also fitted using electrical
equivalent circuits.
Como referenciar
COSTENARO, HELLEN; QUEIROZ, FERNANDA M.; TERADA, MAYSA; MARIE-GEORGES, OLIVIER; COSTA, ISOLDA; MELO, HERCILIO G. de. Corrosion protection of AA2524-T3 anodized in tartaric-sulfuric acid bath and protected with hybrid sol-gel coating. Key Engineering Materials, v. 710, p. 210-215, 2016. DOI: 10.4028/www.scientific.net/KEM.710.210. Disponível em: http://repositorio.ipen.br/handle/123456789/26915. Acesso em: 20 Feb 2025.
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.