Chemistry: electrical and wave energy – Processes and products
Patent
1984-11-09
1987-01-06
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
204206, C25D 508, C25D 706
Patent
active
046345043
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 to each other and to the metal strip (6), and the sections (8, 12) are connected by a communicating lower part of the cell (13), and the top of the section (8) for the strip entrance is set lower than the top of the section (12) for the strip exit by the dimension .DELTA. h.
REFERENCES:
patent: 2317242 (1943-04-01), Allen et al.
patent: 2673836 (1954-03-01), Vonada
patent: 3975242 (1976-08-01), Matsuda et al.
patent: 4183799 (1980-01-01), Sellitto et al.
Bechem Werner
Peters Hubertus
Solbach Werner
Wolfhard Dietrich
Hoesch Aktiengesellschaft
Leader William T.
Niebling John F.
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