Patent ID: 8329013

Claim:
A method for anticorrosion treatment of metallic components, in which the metallic component comprising in part surfaces of zinc which comprise crystalline coating layers of zinc phosphate has been heat-treated at a temperature of at least 100° C., the heat-treated component then passes in succession through the following steps: (A) optional cleaning and/or degreasing of the component, (B) activating pretreatment of the component with an acidic aqueous dispersion containing insoluble phosphates, said dispersion having a pH value of no less than 4, (C) phosphating conversion treatment of the component, such that at least on all the zinc surfaces, and any ferrous surfaces if present, of the component there is in each case present a crystalline zinc phosphate layer with a layer weight of no less than 0.5 g/m 2 ; and (D) electro-dipcoating of the component.