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AssigneeHenkel AG & Co. KGaA
InventorsJan-Willem Brouwer, Frank-Oliver Pilarek, Kristof Wapner, Fernando Jose Resano Artalejo, Christina Angenendt, Andreas Arnold, Nadine Isabel Millies
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A method for the corrosion-protective pretreatment of a plurality of components comprising surfaces of zinc-magnesium hot-dip coated steel, in which the components each successively pass through a degreasing stage, a conversion stage and a painting stage wherein the conversion stage based on an acidic aqueous conversion solution of compounds of the elements Zr and/or Ti dissolved in water is adjusted in pH value and free fluoride content such that homogeneous conversion layers are produced on the zinc-magnesium hot-dip coated steel that reliably provide high paint adhesion regardless of the degree of soiling of the degreasing stage.
A method for corrosion-protective pretreatment of a plurality of components in series, in which the components of the series at least partially have surfaces of zinc-magnesium hot-dip coated steel, and in which the components of the series each undergo successive method steps i)-iii), and at least the surfaces of the zinc-magnesium hot-dip coated steel are successively brought into contact with respectively provided aqueous solutions (I)-(III):
Dependencies are inferred from the claim text.