Bath for the electrodeposition of palladium-silver alloys

US5549810A · kind A · utility

Assignee

• W. C. Heraeus GmbH · DE

Inventors

• G unter Herklotz · Friesenheim, DE
• Thomas Frey · Brighton, US
• Otto Camus · Niederrodenbach, DE

Key dates

• Filing date: Jul 18, 1995
• Grant date: Aug 27, 1996
• Expiry date: Jul 18, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D3/64
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Aqueous ammoniacal baths containing polyamines and mercaptoalkane carboxylic acids and/or mercaptoalkane sulfonic acids for the electrodeposition of palladium-silver alloys are provided, which are particularly suited as electrical contacts. The baths have very good stability and permit the deposition of alloys with a silver content up to approximately 99 weight %.