Localised corrosion of intermetallic particles on aluminium AA2099-T8
2021 (English)In: Corrosion Engineering, Science and Technology, ISSN 1478-422X, E-ISSN 1743-2782, Vol. 56, no 7, p. 610-Article in journal (Refereed) Published
Abstract [en]
Specimens of AA2099-T8 were immersed for different times ranging from 2 to 180 min in 0.1M NaCl. The development of corrosion around intermetallic particles was studied by scanning electron microscopy (SEM) with energy-dispersive X-ray spectrometry (EDXS). The degradation evolution of each major intermetallic particle after exposure of the alloy to electrolyte allowed to determine which particle corroded during the first stages of immersion. The corrosion of lithium-containing particles was also investigated by transmission electron microscopy (TEM). The earliest stages of attack started with localised corrosion of Al2CuMg (S-phase) particles resulting in dealloying which was followed by trenching around these particles. After 10 min, trenching was observed around Al7Cu2Fe(Mn) particles and then progressed to AlCuFeMnSi particles after 90 min.
Place, publisher, year, edition, pages
Taylor and Francis Ltd. , 2021. Vol. 56, no 7, p. 610-
Keywords [en]
Aluminium, kinetic of corrosion, lithium, SEM, Compressive strength, Copper corrosion, Dealloying, Electrolytes, High resolution transmission electron microscopy, Intermetallics, Iron compounds, Lithium metallography, Localized corrosion, Magnesium alloys, Magnesium metallography, Manganese compounds, Scanning electron microscopy, Silicon compounds, Sodium chloride, Ternary alloys, Trenching, Energy dispersive X-ray spectrometry, Inter-metallic particle, Localised corrosion, S-phase, Aluminum corrosion
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:ri:diva-54689DOI: 10.1080/1478422X.2021.1931645Scopus ID: 2-s2.0-85106308736OAI: oai:DiVA.org:ri-54689DiVA, id: diva2:1573983
2021-06-282021-06-282023-05-16Bibliographically approved