Sealing anodically produced oxide layers, on aluminum

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

1983-08-30

1984-05-01

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

148 627, C25D 1118

Patent

active

044459831

ABSTRACT:
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.degree. C. and its boiling point, wherein the aqueous solution has a pH of from about 4 to about 8 and and contains from about 0.0005 to about 0.5 g/l of at least one phosphinocarboxylic acid or its water-soluble salt.

REFERENCES:
patent: 3400023 (1968-09-01), McDonald
patent: 3813303 (1974-05-01), Hofling et al.
patent: 4293441 (1981-10-01), Newell et al.

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