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Exploring the possibility of protective surface oxides upon Mg alloy AZ31 via lutetium additions

AuthorsSamaniego, Alejandro; Gusieva, K.; Llorente, Irene; Feliú Jr., S.; Birbilis, N.
Magnesium alloy
Rare earth elements
Issue Date2014
CitationCorrosion Science 89: 101-110 (2014)
AbstractIn the present study, Mg-alloy AZ31 was alloyed with low-level lutetium (Lu) additions, with the aim of generating a more protective surface oxide/film. To stimulate Lu-rich surface films, AZ31 + Lu specimens were heat treated at 400 °C for up to 300 min. Lu was not detected in the ¿-Mg matrix by EDXS; instead it was incorporated in Al¿Mn¿Lu particles. Micro-additions of Lu promoted a significant reduction of corrosion rates of as-cast AZ31, although Lu was not detected in the surface oxide as determined by XPS. The subsequent heat treatment of as-cast AZ31 + Lu had a negative impact upon corrosion.
Identifiersdoi: 10.1016/j.corsci.2014.08.015
issn: 0010-938X
Appears in Collections:(CENIM) Artículos
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