Procedure for anodising aluminium or aluminium alloys

Details Procedure for anodising aluminium or aluminium alloys Procedure for anodising aluminium or aluminium alloys

C - Chemistry, Metallurgy

25

D

C25D 11/10 (2006.01) C25D 11/08 (2006.01)

Patent

CA 2624579

This invention refers to a procedure for anodising aluminium or aluminium alloys in which an aluminium or an aluminium alloy part is submerged an in an aqueous solution at a temperature between 0°C and 140°C, preferably between 0°C and 130°C, in which said solution includes: - sulphuric acid, - tartaric acid, and - at least one inorganic salt of an element selected between at least one transition metal, a lanthanide element, an actinide, and combinations of them, and applying a controlled potential difference, obtaining layers of aluminium oxide with properties as good as or even better than those obtained through anodising in traditional chromic acid solutions.

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