Procedure for the subsequent washing of conversion layers.

The invention provides for rinsing SURFACES OF ALUMINUM OR ALUMINUM ALLOYS WITH LAYERS OF CONVERSION OBTAINED WITH SOLUTIONS BASED ION titanium, zirconium and / or hafnium, USE OF AQUEOUS SOLUTIONS CONTAINING aluminum, zirconium and fluorides and have A PH Lessthanequals 5. clears, preferably SOLUTION having a concentration TOTAL + ZR + F AL between 0.1 and 8.0 g / L, especially 0.2 and 5.0 g / L , MOLECULAR AND Al: Zr ratio: F of (0.15 to 8.0): 1: (5 to 52), PARTICULARLY (0.15 2.0): 1: (5 to 16), Y HELPFUL OF ESPECIALLY (0.15 to 0.67): 1: (5 to 7). THE IMPLEMENTATION OF SOLUTIONS TO BE RINSE have a temperature of 20 to 80 C, preferably 20 to 50 C is carried out for 1 to 30 seconds. This procedure is especially for pretreating surfaces provided for further LACADO, COATING OR COVERING LAMINATE ADHESIVES.