Correlating corrosion modes with the microstructure of the 2XXX series alloys
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Surface and Interface Analysis
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In this study, the localized corrosion susceptibility of AA2050-T84, AA2198-T851, and AA2024-T3 alloys was compared by immersion in three test solutions, specifically sodium chloride solution (3.5% NaCl), EXCO solution, according to ASTM G34-18, and a solution for intergranular corrosion (IGC) test recommended by ASTM G110-15 and via scanning vibrating electrode technique (SVET). The results showed higher susceptibility of AA2050-T84 alloy to all types of corrosion tested compared to the other studied 2XXX series alloys. Corrosion penetration was deeper in the AA2050-T84 due to its microstructural characteristics as a difference in the micrometric Cu-Rich intermetallic particle distribution on the surface and related to the distribution of the T1 (Al2CuLi) phase.
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KLUMPP, RAFAEL E.; AKBARZADEH, SAJJAD; ARAUJO, JOAO V. de S.; GONON, MAURICE F.; DELAUNOIS, FABIENNE; COSTA, ISOLDA; OLIVIER, MARIE-GEORGES. Correlating corrosion modes with the microstructure of the 2XXX series alloys: a comparative approach. Surface and Interface Analysis, v. 56, n. 9, p. 643-653, 2024. DOI: 10.1002/sia.7321. Disponível em: https://repositorio.ipen.br/handle/123456789/48754. Acesso em: 20 Mar 2026.
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