Method for the passivation of metal surfaces with polymers containing acid groups

US7749337B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Helmut Witteler · Monsheim, DE
• Walter Bertkau · Ludwigshafen, DE
• Thomas Heidenfelder · Münstermaifeld, DE
• Alexander Gothlich · Mannheim, DE
• Jens Haas · Ludwigshafen, DE
• Frank Klippel · Ludwigshafen, DE
• Gunnar Schornick · Neuleiningen, DE

Key dates

• Filing date: Jun 13, 2006
• Grant date: Jul 6, 2010
• Expiry date: Mar 24, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12014
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Process for the passivation of metallic surfaces by treatment of the surface with an acidic, aqueous preparation which comprises at least one water-soluble acid group-containing polymer and Zn, Ca, Mg or Al ions, said process being in particular a continuous process for the passivation of strip metals.