Process for the treatment of high-grade steel strips

US5897764A · kind A · utility

Assignee

• Mannesmann AG · DE

Inventors

• Franz G. Pempera · Neuwied, DE
• Michael Haentjes · Essen, DE

Key dates

• Filing date: Jan 30, 1997
• Grant date: Apr 27, 1999
• Expiry date: Jan 30, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25F7/00
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A process and a system for removing scale from the surface of high-grade steel strip in installations for the production of pickled hot strip and cold strip. The twofold descaling process combines an electrolytic pickling process with and ultrasonic cleaning of the strip surface.