Corrosion and anodizing behavior of dissimilar AA5052-H32 and AA6061-T6 alloys joined by metal inert gas welding
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2023
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EUROPEAN CORROSION CONGRESS
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Resumo
Enormous efforts have been made to reduce fossil fuel consumption and
greenhouse gas emissions in several sectors, such as the transport and
agricultural sectors. Weight reduction is an efficient way to reduce fuel
consumption. In this context, Aluminum alloys are excellent choices due to their
properties of lightweight and high strength. However, corrosion is a major concern
when using dissimilar alloys joined by welding. This might result in galvanic
corrosion. Also, thermal effects during welding might affect the microstructure and
the material corrosion resistance. Consequently, the study of dissimilar materials
joined by welding is of great importance. In order to decrease corrosion
susceptibility, surface protection of aluminum alloys against corrosion is a core
issue in these applications. In this work, the corrosion resistance of the AA5052-
H32 and AA6061-T6 alloys welded by metal inert gas (MIG) welding, with or
without TSA anodizing, was investigated. The corrosion resistance was
evaluated by immersion tests in sodium chloride solution and monitored by
electrochemical impedance spectroscopy (EIS) and as scanning vibrating
electrode technique (SVET). The anodic layers formed by TSA anodizing were
analyzed and characterized by Scanning Electron Microscopy with EnergyDispersive Spectroscopy (SEM-EDS) and Transmission Electron Microscopy
(TEM). The results present the correlation between corrosion resistance,
microstructure and surface film characteristics.
Como referenciar
KLUMPP, RAFAEL E.; AKBARZADEH, SAJJAD; DELAUNOIS, FABIENNE; COSTA, ISOLDA; OLIVER, MARIE-GEORGES. Corrosion and anodizing behavior of dissimilar AA5052-H32 and AA6061-T6 alloys joined by metal inert gas welding. In: EUROPEAN CORROSION CONGRESS, August 27-31, 2023, Belgium, Brussels. Abstract... Disponível em: https://repositorio.ipen.br/handle/123456789/47998. Acesso em: 30 Dec 2025.
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