Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Physico-chemical characterisation of native air-formed oxide films on Al-Mg alloys at low temperature. Influence of water

Abstract : Natural oxide films on two cold-rolled Al-Mg alloys were studied using several techniques (XPS, SIMS, ToF-SIMS, GDOS, SEM, TEM, Wetting measurements). The aim was to characterise and compare the oxide layers formed on the two materials in order to better understand the influence of the thermomechanical history. The experimental tools used allowed the determination of the influence of the annealing process on the nature and structure of the oxides. The hydration and Bronsted behaviour were also investigated. The thickness of the layer, the amount of magnesium oxide and its dissolving resistance in water are strongly modified by the annealing. The oxide film formed on the annealed material is twice as thick as the one on the non-reheated material. The layer on the annealed material contains more magnesium oxide and contains the crystalline forms:beta-Al2O3 and bayerite (Al(OH)(3)). On the contrary, the oxide film formed on the as-rolled material seems to be amorphous. The magnesium oxide is less soluble in water in the annealed film than in the non-reheated one. Furthermore, aluminium and magnesium oxides were found to be hydroxylated on both alloys, and the layer surfaces to behave like a Bronsted meaning base.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal-mines-paristech.archives-ouvertes.fr/hal-00541022
Contributeur : Corinne Matarasso <>
Soumis le : lundi 29 novembre 2010 - 16:21:44
Dernière modification le : jeudi 24 septembre 2020 - 17:22:54

Lien texte intégral

Identifiants

Citation

Sandra Scotto-Sherrif, Evelyne Darque-Ceretti, G. Plassart, Marc Aucouturier. Physico-chemical characterisation of native air-formed oxide films on Al-Mg alloys at low temperature. Influence of water. Journal of Materials Science, Springer Verlag, 1999, 34 (20), p.5081-5088. ⟨10.1023/A:1004709032754⟩. ⟨hal-00541022⟩

Partager

Métriques

Consultations de la notice

202