Correlation between corrosion resistance, anodic hydrogen evolution and microhardness in friction stir weldment of AA2198 alloy

Author(s)

Donatus, Uyime ^[1] ; Goncalves de Viveiros, Barbara Victoria ^[1] ; de Alencar, Maicon Cavalieri ^[1] ; Ferreira, Raphael Oliveira ^[2] ; Milagre, Mariana Xavier ^[1] ; Costa, Isolda ^[1]

Affiliation

^[1] Inst Pesquisas Energet & Nucl, Ave Prof Lineu Prestes 2242, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Escola Politecn, Ave Prof Mello Moraes 2463, Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: MATERIALS CHARACTERIZATION; v. 144, p. 99-112, OCT 2018.
• Web of Science Citations: 8

Abstract

Correlation between corrosion resistance, anodic hydrogen evolution and microhardness in the friction stir weldment of AA2198-T851 alloy has been investigated. Different microscopy techniques, scanning vibrating electrode technique (SVET) and potentiodynamic polarization tests were employed in the investigation. Unlike other 3rd generation Al-Cu-Li alloys where the regions that are most susceptible to corrosion are always within the weld region, the results reveal that the parent material is the most susceptible in this case. There is a direct correlation between corrosion resistance, anodic hydrogen evolution and microhardness in the weldment, and the T-1 phase is associated with the direct correlation. (AU)

• FAPESP's process: 13/13235-6 - Investigation on the localized corrosion and the fatigue corrosion resistance of high strength aluminum alloys joined by friction stir welding (FSW)
• Grantee: Isolda Costa
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/03095-3 - Investigation on corrosion susceptibility of Al-Cu-Li alloys by friction stir welding (FSW) through scanning vibrating electrode technique (SVET)
• Grantee: Uyime Donatus
• Support Opportunities: Scholarships in Brazil - Post-Doctoral