The effect of manufacturing process induced near-surface deformed layer on the corrosion behaviour of AA2198-T851 Al-Cu-Li alloy

Author(s)

Donatus, Uyime ^[1] ; de Sousa Araujo, Joao Victor ^[1] ; Carvalho Machado, Caruline de Souza ^[1] ; Vardhan Mogili, Naga Vishnu ^[2] ; Antunes, Renato Altobelli ^[3] ; Costa, Isolda ^[1]

Affiliation

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

^[2] CNPEM, Lab Nacl Nanotecnol LNNano, Campinas, SP - Brazil

^[3] Univ Fed ABC, Ctr Engn Modelagem & Ciencias Sociais Aplicadas C, Santo Andre - Brazil

• Document type: Journal article
• Source: CORROSION ENGINEERING SCIENCE AND TECHNOLOGY; v. 54, n. 3, p. 205-215, APR 3 2019.
• Web of Science Citations: 2

Abstract

The effect of the near-surface deformed layer on the corrosion behaviour of AA2198-T851 Al-Cu-Li alloy has been investigated using microscopy and electrochemical techniques. This shows that a deformed layer developed by rolling was more active but only exhibited superficial attack compared to a mechanically polished surface, which produced severe localised corrosion associated with the presence of hexagonal T1 particles. The rolled surface became increasingly corrosion resistant with time, but when coupled, galvanically enhanced severe localised corrosion sites developed on the surface over time. (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