Method of manufacturing plated hollow blocks

US5232740A · kind A · utility

Assignee

• Mannesmannufer Aktiengesellschaft · DE

Inventors

• Ingo von Hagen · Krefeld, DE
• Christoph Prasser · Essen, DE
• Fritz-Peter Pleschiutschnigg · Düsseldorf, DE
• Lothar Parschat · Essen, DE

Key dates

• Filing date: Nov 13, 1991
• Grant date: Aug 3, 1993
• Expiry date: Nov 13, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C2/00
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method of manufacturing plated hollow metallic blocks for further processing into seamless tubes of the type in which a body is immersed one or more times into a melt includes: protecting the inner surfaces of a hollow body of plating material against the admission of a melt of support material during the immersion of the hollow body in the melt of support material; immersing such hollow body formed of plating material into the melt of support material; removing the hollow body from the melt of support material; and crystallizing a layer of support material on the outer surface of the hollow body.