Method for the manufacture of a substrate provided with a chromium VI-free and cobalt-free passivation

US10011907B2 · kind B2 · utility

Assignee

• EWALD DÖRKEN AG · DE

Inventors

• Marcel Roth · Goldkronach, DE
• Christopher Koester · Herdecke, DE
• Ingo Klueppel · Bochum, DE
• Verena Grossmann · Herdecke, DE
• Gerhard Reussmann · Essen, DE

Key dates

• Filing date: Feb 13, 2015
• Grant date: Jul 3, 2018
• Expiry date: Jun 6, 2036

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 the manufacture of a substrate provided with a chromium VI-free and a cobalt-free passivation by the application of a first acidic passivation and a second alkaline passivation, containing a silane-modified and/or a siloxane modified silicate, with which an improved protection against corrosion is achieved, an aqueous, acidic composition for passivating and a passivated substrate, and a device for applying the passivation.