METHOD FOR COATING METAL SURFACES WITH AN AQUEOUS, POLYMER-CONTAINING COMPOSITION, SAID AQUEOUS COMPOSITION AND THE USE OF THE COATED SUBSTRATES

摘要

The invention relates to a method for coating a metal surface with an aqueou s composition, characterized in that the composition contains, in addition to water: a) at least one organic film former that contains at least one water- soluble or water-dispersible polymer with an acid number ranging from 5 to 200, b) at least one particulate inorganic compound with an average particle diameter measured by a scanning electron microscope in the range of from 0.0 05 to 0.3 .mu., c) at least one slip additive and/or at least one corrosion inhibitor, d) optionally at least one organic solvent, e) optionally at leas t one silane and/or siloxane, f) optionally at least one cross-linking agent, and g) optionally at least one chromium (VI) compound. The clean metal surfa ce is contacted with the aqueous composition and a particle-containing film is formed on the metal surface which is then dried. The dried and optionally al so cured film has a layer thickness ranging from 0.01 to 10 .mu.m. The inventio n further relates to a corresponding aqueous composition.