Method and apparatus for monitoring the partial density of metal and acid in pickling baths

US5065417A · kind A · utility

Inventors

• Jurgen Behringer · Bochum, DE
• Dieter Evers · Neuenbürg, DE
• Dieter Schonert · Bochum, DE

Key dates

• Filing date: Jul 22, 1988
• Grant date: Nov 12, 1991
• Expiry date: Jul 22, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23G1/02
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method and an apparatus for determining the partial density, or concentration, of various substance components in a liquid, by calculating the absorption of two different gamma radiations, one of higher energy and one of lower energy. To this end, the liquid is carried in a conduit system, irradiated by the two gamma radiations, and the attenuation of their intensity is detected. A specific combination of the counting rates of the two radioactive sources is used for determining the partial density of two substances in a three-substance system. The primary field of application is the continuous, contactless monitoring of the acid and metal concentration in pickling baths for chemical descaling, and for roughening and cleaning of metal surfaces.