Corrosion analyses of anodized aluminum for biomedical purposes
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2023
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LATIN-AMERICAN CONGRESS OF ARTIFICIAL ORGANS AND BIOMATERIALS, 12th
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Introduction and objective: Anodic aluminum oxide has attracted a lot of interest due to the regular
arrangement of nanopores, ease of control of the nanopores diameter, large specific surface area, low cost,
good thermal stability, absence of toxicity and biocompatibility. The geometric arrangement of nanopores
makes it possible to use alumina as a mold for the synthesis of various nanostructures, such as nanopores,
nanotubes, nanorods and nanowires that have many advantages in advanced application areas due to their
unique chemical, physical, mechanical, and optical properties [1,2]. The objective of this work was to study
the corrosion susceptibility of anodized aluminum samples for biomedical applications.
Methodology: In the present work, the localized corrosion resistance of AA6061aluminum alloy anodized in
oxalic acid solution (C2H2O4) and sulfuric acid (H2SO4) was evaluated by electrochemical techniques. Prior
to the anodization stage, the samples were electrolytically polished in a solution of perchloric acid and
ethanol.
Results and discussion: All samples showed a protective behavior on their surfaces, higher corrosion
potentials in relation to the standard reference sample and a shift towards lower values of corrosion current
densities in relation to the sample without passivation treatment. These results indicate that the anodizing
treatments of AA6061 aluminum surfaces in oxalic or sulfuric acid are effective in producing surfaces
resistant to localized corrosion and can therefore be used to coat this type of surface, ensuring an increase
in the useful life of the devices.
Conclusions: The results indicated superior corrosion resistance in the anodized samples in both conditions.
Therefore, it is necessary to constantly advance research on the use of nanoporous anodic alumina coatings
on biomaterials surfaces.
Como referenciar
PIERETTI, EURICO F.; NEVES, MAURICIO D.M.; CORREA, OLANDIR V.; ANTUNES, RENATO A.; OLIVEIRA, MARA C.L.; PILLIS, MARA C.L. Corrosion analyses of anodized aluminum for biomedical purposes. In: LATIN-AMERICAN CONGRESS OF ARTIFICIAL ORGANS AND BIOMATERIALS, 12th, December 12-15, 2023, Mar del Plata, Argentina. Abstract... p. 79-79. Disponível em: https://repositorio.ipen.br/handle/123456789/47950. Acesso em: 12 Mar 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.