Correlating corrosion modes with the microstructure of the 2XXX series alloys: A comparative approach

Author(s)

Klumpp, Rafael Emil ; Akbarzadeh, Sajjad ; de Sousa Araujo, Joao Victor ; Gonon, Maurice Francois ; Delaunois, Fabienne ; Costa, Isolda ; Olivier, Marie-Georges

• Document type: Journal article
• Source: SURFACE AND INTERFACE ANALYSIS; v. 56, n. 9, p. 11-pg., 2024-05-23.

Abstract

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. (AU)

• FAPESP's process: 19/18388-1 - Effect of the microstructure of high strength Al alloys on formation and corrosion resistance of the anodized layer
• Grantee: João Victor de Sousa Araujo
• Support Opportunities: Scholarships in Brazil - Doctorate