Method for electrolytically passivating a surface of silver, silver alloy, gold, or gold alloy

US11851780B2 · kind B2 · utility

Assignee

• Atotech Deutschland GmbH & Co. KG · DE

Inventors

• Robert Rüther · Hemmingen, DE
• Olaf Kurtz · Berlin, DE
• Joko Setyadi-Lie · Berlin, DE
• Tse-Cheen Foong · Berlin, DE

Key dates

• Filing date: Aug 15, 2022
• Grant date: Dec 26, 2023
• Expiry date: Aug 15, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D9/08
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The present invention relates to an aqueous passivation solution having a pH in the range from 5.4 to 7.2, the solution including