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US 8,540,826 B2Granted
Method of surface treatment of aluminum foil and its alloy and method of producing immobilized nanocatalyst of transition metal oxides and their alloys
AssigneeUniversity of Windsor
InventorsSrimanta Ray, Jerald A. D. Lalman
Life of this patent
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Abstract
A process for surface treatment of aluminium foils includes steps of applying an etching solution to chemically etch at least one surface of the foil to form an etched surface, and forming an aluminium oxidized coating on the etched surface. The etching solution comprises an aqueous solution which includes hydrogen peroxide as an oxidant and sulfuric, orthophosphoric or nitric acid.
Claims7
A process for a surface treatment of an aluminium foil comprising the steps of:
- applying an etching solution to chemically etch at least one surface of said foil to form an etched surface, said etching solution comprising an aqueous solution including an oxidant and an acid selected from the group consisting of sulfuric acid, orthophosphoric acid and nitric acid, said acid being present in said solution in a concentration selected at from about 5.4 M to 9.4 M, and wherein said oxidant comprises hydrogen peroxide present in said solution in an amount of about 12 wt % to 18 wt %, and
- forming an aluminium oxidized coating on said etched surface.
Dependencies are inferred from the claim text.