Process for sealing anodically oxidized aluminium or aluminium a

Details Process for sealing anodically oxidized aluminium or aluminium a Process for sealing anodically oxidized aluminium or aluminium a

1984-11-08

1986-05-13

Niebling, John F.

Metal treatment

Compositions

Heat treating

204 351, 204 383, 427333, C23C 2266

Patent

active

045884480

ABSTRACT:
A process for sealing an oxidized 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.

REFERENCES:
patent: 2755239 (1956-07-01), Glauser et al.
patent: 3376143 (1968-04-01), Barkman
patent: 3647649 (1972-03-01), Treiber
patent: 3689379 (1972-09-01), Treiber
patent: 3897287 (1975-07-01), Meyer et al.
patent: 4045599 (1977-08-01), Remaley et al.

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