Visible dried-in-place non-chrome treatment for aluminum
AssigneeBetz Laboratories, Inc.
InventorsJiangbo Ouyang, Bruce V. Haberle, Philip D. Deck, William L. Harpel
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Abstract
A method of providing color to a dried-in-place, non-chromate conversion coating is provided. The addition of a phthalo green pigment and optionally a nonionic surfactant to an aqueous, dried-in-place conversion coating treatment solution provides for a colored conversion coating without adversely effecting the corrosion resistance or adhesion properties of the conversion coating.
Claims4
A method of imparting color to a dried-in-place non-chromate conversion coating formed on an aluminum or an aluminum alloy surface through contact with the conversion coating treatment solution comprising adding a phthalo green pigment to said conversion coating treatment solution prior to said contact thereby making the conversion coating visible but not so strong as to bleed through a subsequently applied coating.
Dependencies are inferred from the claim text.