Process of preparation with a view to electrophoretic coatings, either in the form of size or decoration on aluminium and its alloys which have been anodised beforehand

摘要

The invention relates to the preparation, the preliminary composition of a bath with pH control, after anodising, and definition of electrical and time parameters before cataphoresis, anaphoresis or autophoresis of aluminium and of its alloys, with a view to creating an intercrystalline affinity on the anodised surface to promote the electrical efficiency, on the one hand, and the entry of the electrophoretic resins in solution into the anodic layer, on the other hand, before baking in the oven.