EIS behavior of anodized and primer coated AA2198–T851 compared to AA2024–T3 exposed to salt spray CASS test
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Surface and Interface Analysis
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In this investigation, the corrosion behavior of AA2198–T851 was compared to AA2024–T3 by electrochemical impedance spectroscopy
and the surface of both alloys was analyzed by Field Emission Gun (FEG) scanning electron microscopy (SEM) and Xray
energy dispersive analysis (EDX). Electrochemical impedance spectroscopy (EIS) results for the uncoated surface of both alloys
showed higher pitting susceptibility associated to the AA2198–T851 alloy comparatively to the AA2024–T3. In order to improve
the corrosion resistance of both alloys, tartaric sulphuric acid anodising (TSA) was carried out with both alloys followed by primer
application. The corrosion resistance of the anodized and primer coated samples was also evaluated by CASS salt spray test
followed by EIS tests at increasing periods of exposure to the CASS test. The results showed larger amounts of corrosion products
associated to the primer coated AA2198–T851 alloy comparatively to the AA2024–T3 alloy. Diffusionwas only indicated in the EIS
results of the AA2198–T851 samples likely because of large amounts of porous corrosion products on the exposed surface of this
alloy to the corrosive environment.
Como referenciar
QUEIROZ, F.M.; BUGARIN, A.F.S.; HAMMEL, N.P.; CAPELOSSI, V.R.; TERADA, M.; COSTA, I. EIS behavior of anodized and primer coated AA2198–T851 compared to AA2024–T3 exposed to salt spray CASS test. Surface and Interface Analysis, v. 48, n. 8, p. 755-766, 2016. DOI: 10.1002/sia.5982. Disponível em: http://repositorio.ipen.br/handle/123456789/27209. Acesso em: 30 Dec 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.