Process for the treatment of stainless steel for a direct galvanic gold plating

US4659438A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Werner Kuhn · Rodenbach, DE
• Wolfgang Zilske · Hanau, DE

Key dates

• Filing date: May 14, 1981
• Grant date: Apr 21, 1987
• Expiry date: May 14, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25F1/00
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

For the direct gold plating of stainless steel parts in acid baths there is needed a pretreatment of the parts. Known processes operate with corrosive media such as strong acids and attack the surface. These disadvantages are avoided by putting the stainless steel part in an electrolytic, aqueous solution and first treating cathodically and subsequently anodically.