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

Alejandro Samaniego, Kateryna Gusieva, I Llorente, Sebastian Feliu, Nick Birbilis

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21 Citations (Scopus)

Abstract

In 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 α-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.

Original languageEnglish
Pages (from-to)101-110
Number of pages10
JournalCorrosion Science
Volume89
Issue numberC
DOIs
Publication statusPublished - 2014

Keywords

  • Alloy
  • AZ31
  • Lutetium
  • Magnesium
  • Magnesium alloy
  • Rare earth elements

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