Method for coating metallic surfaces with a multi-component aqueous composition

US10378120B2 · kind B2 · utility

Assignee

• CHEMETALL GMBH · DE

Inventors

• Thomas Kolberg · Heppenheim, DE
• Peter Schubach · Nidderau, DE
• Manfred Walter · Nuremberg, DE
• Carola Komp · Mörfelden, DE
• Michael Dröge · Frankfurt am Main, DE

Key dates

• Filing date: Oct 23, 2012
• Grant date: Aug 13, 2019
• Expiry date: May 17, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31663
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method for coating metallic surfaces with aqueous compositions, wherein a silane-based aqueous composition containing at least one silane and/or a related silicon-containing compound and optionally additional components is treated further, for example, at temperatures above 70° C., in a pretreatment step without drying the coating, by using at least one aqueous rinse step after this pretreatment step and then performing an electrodeposition coating, in which at least one surfactant is added at least in the last rinse step of the aqueous rinse steps. Coated metallic surfaces are also described.