On the severe localized corrosion susceptibility of the AA2198-T851 alloy

Author(s)

de Sousa Araujo, Joao Victor ^[1] ; Donatus, Uyime ^[1] ; Queiroz, Fernanda Martins ^[2] ; Terada, Maysa ^[3] ; Milagre, Mariana Xavier ^[1] ; de Alencar, Maicon Cavalieri ^[1] ; Costa, Isolda ^[1]

Affiliation

^[1] IPEN CNEN, Av Prof Lineu Prestes 2242, Sao Paulo - Brazil

^[2] Univ Sao Paulo, EPUSP, Ecola Politecn, Av Prof Mello Moraes 2463, Sao Paulo - Brazil

^[3] LNNano CNPEN, Brazilian Nanotechnoll Natl Lab, Rua Giuseppe Maximo Scolfaro, Campinas, SP - Brazil

• Document type: Journal article
• Source: Corrosion Science; v. 133, p. 132-140, APR 1 2018.
• Web of Science Citations: 14

Abstract

The time dependent susceptibility of AA2198-T851 Al-Cu-Li alloy to severe localized corrosion in 0.01 mol L-1 NaCl solution has been investigated by immersion and SVET tests. The results reveal that the propagation of severe localized corrosion, in the alloy, is crystallographic and it is associated with the slip bands in the individual grains of the alloy. The slip bands caused uneven precipitation of the active T1 particles. Also, oscillations in SVET current density values associated with deposition and detachment of corrosion products were observed. Furthermore, the intensity of corrosion activities increased over time for open or partially covered pits. (AU)

• 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
• 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