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AssigneeUniversity of Southern California
InventorsFlorian B. Mansfeld, You Wang, Simon H. Lin
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A method for treating the surface of aluminum alloys hang a relatively high copper content is provided which includes the steps of removing substantially all of the copper from the surface, contacting the surface with a first solution containing cerium, electrically charging the surface while contacting the surface in an aqueous molybdate solution, and contacting the surface with a second solution containing cerium. The copper is substantially removed from the surface in the first step either by (i) contacting the surface with an acidic chromate solution or by (ii) contacting the surface with an acidic nitrate solution while subjecting the surface to an electric potential. The corrosion-resistant surface resulting from the invention is excellent, consistent and uniform throughout the surface. Surfaces treated by the invention may often be certified for use in salt-water services.
A method for preparing the surface of an aluminum alloy for a corrosion prevention treatment, the method comprising the steps of:
A method for preparing the surface of an aluminum alloy for a corrosion prevention treatment wherein the alloy has a copper content between about one percent and about two percent, the method comprising the steps of:
A method for preparing the surface of an aluminum alloy for a corrosion prevention treatment wherein the alloy has a copper content greater than about two percent, the method comprising the steps of:
Dependencies are inferred from the claim text.