Process for sealing anodic oxidation layers on aluminium surfaces and its alloys

摘要

This invention relates to a process for sealing alumina layers formed on the surface of aluminum and its alloys by anodic oxidation, and to the composition for effecting such sealing. The process, which is preferably carried out at room temperatures for purposes of economy, comprises contacting said layer with an aqueous composition which includes phosphate ions, trivalent chromium, and an emulsified organic resin.