Process for sealing anodically oxidised aluminium or...

Details Process for sealing anodically oxidised aluminium or... Process for sealing anodically oxidised aluminium or...

C - Chemistry, Metallurgy

25

D

6/221, 400/7304,

C25D 11/24 (2006.01) C07C 143/24 (1985.01) C07C 143/44 (1985.01)

Patent

CA 1258249

A PROCESS FOR SEALING ANODICALLY OXIDISED ALUMINIUM OR ALUMINIUM ALLOY SURFACES Abstract of the Disclosure A process for sealing an oxidised aluminium or aluminium alloy surface comprising sealing the surface in the presence of a sealing agent to hinder the formation of a smut layer, the agent being the reaction product of one or more sulphonated aromatic compounds with an aldehyde and/or dimethylolurea or a mixture of formaldehyde and urea. A novel composition comprising the reaction product above and a cobalt or nickel salt may also be used as the above mentioned sealing agent.

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