Anodising magnesium and magnesium alloys

Details Anodising magnesium and magnesium alloys Anodising magnesium and magnesium alloys

C - Chemistry, Metallurgy

23

C

C23C 22/84 (2006.01) C25D 11/30 (2006.01)

Patent

CA 2284616

This invention provides a method for the anodisation of magnesium or magnesium based alloys using an electrolytic solution (preferably derived primarily from phosphoric acid) containing ammonia, amines or both. The use of such an aqueous electrolytic solution (irrespective of other additions) in at least preferred forms alters the conditions under which anodisation can occur to provide a more than satisfactory coating on the magnesium material with reduced cycle times.

L'invention concerne un procédé d'anodisation du magnésium ou d'alliages à base de magnésium utilisant une solution électrolytique (de préférence dérivée essentiellement d'acide phosphorique) contenant de l'ammoniaque, des amines ou les deux. L'utilisation de cette solution électrolytique aqueuse (quelles que soient les autres additions), au moins dans les formes préférées, modifie les états dans lesquels l'anodisation peut avoir lieu afin de fournir un revêtement plus que satisfaisant sur le matériau en magnésium avec des temps de cycle réduits.

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