Two-stage method for the corrosion protection treatment of metal surfaces

摘要

The invention relates to an at least two-stage method for corrosion protection treatment of metal surfaces, wherein, in a first step (i), an organic coating comprising an aqueous phase (A) is applied to the metal surface and, in a following step (ii), the organic coating applied to the metal surface contacted with an acidic, aqueous composition (B) comprising at least one or more water-soluble compounds containing at least one atom selected from the elements Zr, Ti, Si, Hf, V and/or Ce and one or more water-soluble compounds that release copper ions. The invention further comprises a metal component that is at least partially made of steel, iron, zinc and/or aluminum and the alloys thereof and has been treated by the method according to the invention, and to the use thereof in automobile construction and in the construction industry and for producing household appliances and electronics housings.

主权项

1. A method for corrosion-protective treatment of metal surfaces, comprising: in a first step (i) applying an organic coating made up of an aqueous phase (A) onto the metal surface, wherein the metal surface having the organic coating is, in a subsequent step (ii), brought into contact with an acidic aqueous composition (B) that comprises at least
a) one or more water-soluble compounds containing at least one atom selected from the elements Zr, Ti, Si, Hf, V, and Ce, and b) one or more water-soluble compounds that release copper ions; wherein the acidic aqueous composition (B) contains no more than 1 ppm soluble phosphates.