Sealing anodically produced oxide layers on aluminum

Details Sealing anodically produced oxide layers on aluminum Sealing anodically produced oxide layers on aluminum

C - Chemistry, Metallurgy

23

C

204/21.5

C23C 22/47 (2006.01) C25D 11/24 (2006.01)

Patent

CA 1212072

ABSTRACT OF THE DISCLOSURE A process for sealing anodically produced oxide layers on aluminum and aluminum alloys by treating them with an aqueous solution at a temperature between about 90°C and its boiling point, wherein the aqueous solution has a pH of from about 4 to about 8 and contains from about 0.0005 to about 0.5 g/l of at least one phosphinocarboxylic acid or its water-soluble salt.

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