Low temperature seal for anodized aluminum surfaces
AssigneeAmchem Products, Inc.
InventorsGlenn C. Schoener, Susan V. Hess, Anthony J. Malloy, Jayne P. Wicklund
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Abstract
This invention relates to a process for sealing an anodized aluminum surface by contacting the surface with an aqueous acidic sealing solution having dissolved therein zirconium and/or titanium and dissolved fluoride, said solution preferably including dissolved silicate and/or a dissolved thiourea compound, and including optionally a sealing auxiliary, the process being carried out at a temperature of no greater than about 40.degree. C.
Claims29
A method for sealing an anodized aluminum surface comprising contacting said surface at a temperature of no greater than about 40.degree. C. with an aqueous acidic sealing solution having a pH of about 2 to about 6.5 and comprising at least about 0.18 g/l of dissolved metal selected from the group consisting of zirconium and titanium and a mixture thereof, at least about 0.2 g/l of dissolved fluoride and at least about 0.1 g/l of dissolved silicate (based on SiO.sub.2 content).
Dependencies are inferred from the claim text.