SEALING PROCESSING METHOD FOR ANODIC OXIDATION FILM OF ALUMINIUM OR ALUMINIUM ALLOY

摘要

PURPOSE:To perform the sealing processing where the surface is clean and coloring is prevented, by soaking the anodic oxidation film of aluminium or an aluminium alloy into the aqueous solution of an alkali metal salt, an alkaline earth metal salt, and so on containing boron of a specific concentration. CONSTITUTION:Aluminium or an aluminium alloy where an anodic oxidation film is generated is soaked into the aqueous solution of an alkali metal salt, an alkaline earth metal salt, an ammonium compound, and an amine compound containing boron in the range of concentration 0.01-50g/l and is subjected to the sealing processing. Thus, the superior sealing processing where the surface is clean and coloring is prevented is possible.