| abstract |
A process for making a composite aluminum article includes: treating an anodized, sealed aluminum substrate with a low friction material adherent to said substrate. The resulting substrate is then treated with an aqueous solution or suspension containing at least one salt having an anion, a cation, or both of a divalent metal or a trivalent metal. The process is particularly useful for producing hard anodized cookware, which exhibits improved acid and stain resistance. |