Abstract:
The invention relates to a method for passivation of metal surfaces by treatment of the surface with an acid aqueous composition, containing at least one water-soluble acid-group comprising polymer and Zn, Ca, Mg, or Al ions, said method being particularly a continuous method for the passivation of strip metals.
Abstract:
The present invention relates to a method for passivating metallic surfaces, wherein the metallic surface is brought into contact with an aqueous composition containing at least one water-soluble polymer (X) that comprises acid groups, and at least one polyamine (P), wherein the pH of the composition is in the range from 0.5 to 2.
Abstract:
The invention relates to a continuous method for treating the surface of metal strips, wherein a coating having a thickness of no more than 3 μm is applied, wherein the device used for the application is equipped with at least one IR sensor which operates using reflection geometry, faces a coated side of the strip, and is used to measure the layer thickness of the coating while the strip is moving.
Abstract:
The invention relates to a method for passivation of metal surfaces by treatment of the surface with an acid aqueous composition, containing at least one water-soluble acid-group comprising polymer and Zn, Ca, Mg, or Al ions, said method being particularly a continuous method for the passivation of strip metals.
Abstract:
The invention relates to a continuous method for treating the surface of metal strips, wherein a coating having a thickness of no more than 3 μm is applied, wherein the device used for the application is equipped with at least one IR sensor which operates using reflection geometry, faces a coated side of the strip, and is used to measure the layer thickness of the coating while the strip is moving.