Process for the electrodeposition of metals

US4634504A · kind A · utility

Assignee

• Hoescht Aktiengesellschaft · DE

Inventors

• Werner Bechem · Hilchenbach, DE
• Hubertus Peters · Dortmund, DE
• Werner Solbach · Wallmenroth, DE
• Dietrich Wolfhard · Dortmund, DE

Key dates

• Filing date: Nov 9, 1984
• Grant date: Jan 6, 1987
• Expiry date: Nov 9, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D7/0628
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention concerns a process for the electrodeposition of metals, especially zinc, on to metal strip, particularly steel strip, from an aqueous solution of the metal salts, using high relative flow velocities between electrolyte and strip and electrolyte and anodes, the metal strip being introduced vertically into the electrolyte, turned around and led vertically out of the electrolyte. A process of this nature should enable high current densities to be employed, including in vertical cells in which the metal strip, in particular steel strip, is passed vertically through the electrolyte, and permit even relative flows between the metal strip and the electrolyte, thus producing even deposition conditions for the parts of the metal strip entering and leaving the cell. The invention proposes that the electrolyte is forced to flow against the direction of strip travel throughout the section between the anodes and the metal strip. The equipment envisaged for carrying out the process is designed so that the electrolytic cell (1) is fitted with shaft-shaped sections (8, 12) for the strip entrance (8) and exit (12), within which sections (8, 12) the anodes (9, 11) are arranged parallel…