Process for the protective sealing of anodic aluminum oxide and its alloys which confers a particular resistance to agressive alkaline agents

摘要

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.