Corrosão localizada do alumínio em meios aerados e em meios com baixo teor oxigênio
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In this study, the influence of
deaeration on the electrochemical behavior of aluminum was studied by polarization techniques. The advantages of deaeration
for the evaluation of localized corrosion on aluminum are discussed. The influence of the corrosive environment with low oxygen
contents on the electrochemical response of aluminum was evaluated by anodic and cathodic potentiodynamic polarization curves.
The polarization tests were carried out in chloride solutions followed by optical and scanning electron microscopy characterization.
It was observed that deaeration of the solution significantly influences the electrochemical behavior of aluminum, as predicted by
corrosion kinetics theories. For the cathodic curves, a decrease in the limiting current density for the oxygen reduction reaction (ORR)
was observed for low oxygen solutions, while the “apparent” initiation of the hydrogen evolution reaction (HER) was shifted to
higher potentials. In the anodic curves, a common passive behavior was not observed in aerated conditions, however, at the corrosion
potential, localized pitting was observed indicating that the material was already above the breakdown potential (Ebr). In the low
oxygen content solution, however, a passive region with a breakdown potential, was observed on the anodic curves.
Como referenciar
ARAUJO, JOAO V. de S.; GABBARDO, ALINE D.; FERNANDES, STELA M.; COSTA ISOLDA. Corrosão localizada do alumínio em meios aerados e em meios com baixo teor oxigênio: estudo e comparação por meio de curvas de polarização. Quimica Nova, v. 48, n. 1, p. 1-12, 2025. DOI: 10.21577/0100-4042.20250067. Disponível em: https://repositorio.ipen.br/handle/123456789/49827. Acesso em: 29 Apr 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.