Method for applying a phosphate covering and use of metal parts thus phospated

US7208053B2 · kind B2 · utility

Assignee

• CHEMETALL GMBH · DE

Inventors

• Hardy Wietzoreck · Frankfurt am Main, DE
• Klaus Bittner · Frankfurt am Main, DE
• Thomas Kolberg · Heppenheim, DE
• Marion Wegner · Frankfurt am Main, DE
• Thomas Wendel · Schwalbach, DE
• Gerrit Schüllermann · Maintal, DE

Key dates

• Filing date: Mar 6, 2001
• Grant date: Apr 24, 2007
• Expiry date: Apr 28, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C22/73
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Metallic surfaces are coated with an aqueous, acidic phosphate solution containing 10 to 60 g/l zinc, 0.5 to 40 g/l manganese, 50 to 300 g/l phosphate ions calculated as P2O5, and optionally other components.