Effect of Ce on the corrosion resistance of anodized AA2024-T3 FSWed
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2019
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BRAZIL MRS MEETING, 18th
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Resumo
Friction stir welding (FSW) is a solid-state joining technique, which has numerous
advantages over conventional fusion techniques, such as automation and
reproducibility, environmentally friendly, and capability to weld large thicknesses
in a single pass.
AA2024 are widely used in the aerospace industry due to their properties
as lightweight, high specific strength and durability. However, they are prone to
localized corrosion due to its high amount of intermetallics. New anodizing and
sealing processes have been studied due to the environmental and health
problems related to the sealing treatment containing hexavalent chromium ions.
This has encouraged the search for new processes for surface treatment of
metals. Recent studies are pointing towards tartaric-sulphuric anodizing, as a
viable alternative for the corrosion protection of aluminum alloys, including
surface treatments with cerium ions. Other promising method to protect the
exposed metal surface is to use eco-friendly alternative corrosion inhibitors in
combination with a barrier coating system. Sol–gel coatings have also been
extensively studied as potential pre-treatments not associated to toxic residues for
aluminum alloys surface preparation prior to paint. It has been demonstrated an
efficient alternative for replacement of the chromate technology.
In this study, friction stir welded samples were anodized and then sealed
in an aqueous solution with the addition of cerium ions at 70 °C. The effect of Ce
on the characteristics of the surface film formed, such as morphology and
corrosion resistance, was investigated by SEM and electrochemical impedance spectroscopy. Samples unsealed or hydrothermally sealed were also tested for
comparison. The EIS results showed that the addition of Ce (III) ions improved
the corrosion resistance of the AA 2024-T3 TSA anodized and hydrothermal
sealed.
Como referenciar
AGUIAR, DEIZE B. dos S.; QUEIROZ, FERNANDA M.; VERISSIMO, NATHALIA C.; AYUSSO, VICTOR H.; PEREIRA, VICTOR F.; FONSECA, EDUARDO B. da; MELO, HERCILIO G. de; COSTA, ISOLDA; TERADA, MAYSA; BUGARIN, ALINE F.S. Effect of Ce on the corrosion resistance of anodized AA2024-T3 FSWed. In: BRAZIL MRS MEETING, 18th, September 22-26, 2019, Balneário Camburiú, SC. Abstract... São Carlos, SP: Aptor Software, 2019. p. 2111-2112. Disponível em: http://repositorio.ipen.br/handle/123456789/31037. Acesso em: 27 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.