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

journal contribution
posted on 2023-11-03, 04:54 authored by A Samaniego, K Gusieva, I Llorente, S Feliu, N Birbilis
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.

History

Journal

Corrosion Science

Volume

89

Pagination

101-110

ISSN

0010-938X

eISSN

1879-0496

Language

English

Issue

C

Publisher

PERGAMON-ELSEVIER SCIENCE LTD