Process for the protective sealing of anodic aluminum oxide and

Details Process for the protective sealing of anodic aluminum oxide and Process for the protective sealing of anodic aluminum oxide and

1983-05-27

1985-10-29

Metz, Andrew H.

Metal treatment

Compositions

Heat treating

204 376, 204 383, C25D 1118

Patent

active

045499101

ABSTRACT:
A process for sealing anodic oxide coating on aluminum and aluminum alloys wherein organic substances with hydrolyzable functional groups like organo-functional silanes react with water at room temperature forming a silantriolic compound [according to the reaction: R'-Si(OCH.sub.3).sub.3 +3H.sub.2 O--R'-Si(OH).sub.3 ] which in turn reacts with the oxide coating forming a stable chemical bridge between silicon and metal thusly: ##STR1## Analogously the silantriol reacts with oxides of other metals such as Fe, Mn, Sn, and Cu commonly used for coloring, forming stable chemical bridges and therefore sealing the color.

REFERENCES:
patent: 3494839 (1970-02-01), Chambers et al.
patent: 3832239 (1974-08-01), Hoch et al.
patent: 3852124 (1974-12-01), Fassell
patent: 3935349 (1976-01-01), Terai et al.
patent: 4208223 (1980-06-01), Hofstatter
patent: 4225398 (1980-09-01), Hasegawa et al.
patent: 4310390 (1982-01-01), Bradley et al.

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