Use of molybdate in a process for sealing anodic oxide films formed on aluminium

摘要

The consolidation by hydration of the oxide layer obtained by anodization of aluminium or aluminium alloy is carried out in bath under the following conditions: (a) base of the bath: dematerialized water containing 1 to 5 g/l of an anti-corrosion agent with a molybdenum oxide (MoO3) base; (b) bath temperature: 90 - 100[deg]C; (c) duration of immersion: 20 - 60 minutes; (d) pH of the bath: 6 +- 1; (e) the time and the temperature being in inverse relation; (f) the method allowing a rate of hydration of between 10 and 30%, preferably between 15 and 25%. An independent claim is also included for the preparation of anodized and consolidated aluminium or aluminium alloy components in which the consolidation is carried out by the inventive method.