FORFARANDE FOR ANODISERING OCH ANSLUTANDE ELEKTROLYTISK INFERGNING AV DET BILDADE OXIDSKIKTET HOS EN ALUMINIUMBANA MEDELST VEXELSTROM I EN KONTINUERLIG GENOMDRAGSPROCESS

摘要

Continuous process for anodizing and subsequent electrolytic coloring of an aluminium strip or foil with A.C. in which the strip after leaving the anodistaion unit passes through an aqueous acidic contacting electrolyte, e.g. dilute sulfuric acid, and then through the aqueous acidic coloring electrolyte containing metal ions and in which the A.C. source is connected to inert electrodes dipping in the contacting and in the coloring electrolyte respectively.