Preliminary metallizing treatment of zinc surfaces

US8293334B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Karsten Hackbarth · Goldkronach, DE
• Wolfgang Lorenz · Dormagen, DE
• Eva Wilke · Hilden, DE
• Marcel Roth · Goldkronach, DE
• Reiner Wark · Wuppertal, DE
• Michael Wolpers · Erkrath, DE
• Guadalupe Sanchis Otero · Goldkronach, DE
• Christian Rosenkranz · Wunstorf, DE
• Peter Kuhm · Hilden, DE
• Kevin Meagher · Northville, US

Key dates

• Filing date: Nov 18, 2009
• Grant date: Oct 23, 2012
• Expiry date: Nov 18, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12799
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to a method for a preliminary metallizing treatment of galvanized or zinc alloy-coated steel surfaces or joined metallic parts that at least partly have zinc surfaces, in a surface treatment encompassing several process steps. In the disclosed method, metallic coats of especially a maximum of 100 mg/m2 of molybdenum, tungsten, cobalt, nickel, lead, tin, and/or preferably iron are produced on the treated zinc surfaces. Another embodiment of the invention relates to an uncoated or subsequently coated metallic part which has been subjected to the disclosed preliminary metallizing treatment as well as the use of such a part for making bodies during the production of automobiles, building ships, in the construction industry, and for manufacturing white products.