Method and composition for coating aluminum

Details Method and composition for coating aluminum Method and composition for coating aluminum

C - Chemistry, Metallurgy

23

C

C23C 22/36 (2006.01)

Patent

CA 2049316

The invention is a composition and method for treating aluminum. The composition comprises phosphonic acid, fluorozirconic acid, fluorotitanic acid, fluorohafnic acid, or fluorosilicic acid and a Mannich adduct of an polyalkenyl phenol or tannin. The aluminum is treated by contact with the composition. An inorganic-organic conversion coating is applied to the aluminum in a single step.

Composition et procédé servant à traiter l'aluminium. La composition comporte de l'acide phosphorique de l'acide fluorozirconien, de l'acide fluorotitanique de l'acide fluorohafnique ou de l'acide fluosilicique ainsi qu'un produit d'addition Mannich d'un phénol ou d'un tannin polyalkényles. L'aluminium est traité par le contact avec la composition. Une couche de conversion inorganique-organique est appliquée à l'aluminium en une seule étape.

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