Method and apparatus for electro-treating a metal strip

Details Method and apparatus for electro-treating a metal strip Method and apparatus for electro-treating a metal strip

1982-09-27

1984-02-07

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

204206, 204224R, 204290R, C25D 502, C25D 1700, C25D 1710

Patent

active

044301669

ABSTRACT:
An apparatus and method for electro-treating one surface of a metal strip alone or both surfaces sequentially. Another embodiment electro-treats both surfaces simultaneously. All embodiments employ a roll having an electrically conducting outer surface around a substantial portion of which is wrapped the strip. An electrically insulating mesh layer is interposed between the strip and the roll's outer surface, and electrolytic liquid floods the openings in the mesh layer and is retained there by that portion of the strip which is wrapped around the roll. The strip is advanced in a downstream direction, and the roll is simultaneously rotated. The strip and the outer surface of the roll are electrically charged with opposite polarities, but neither one is immersed in a bath of electrolytic liquid. Cations flow between the roll and the wrapped-around portion of the strip through the liquid in the openings of the mesh layer.

REFERENCES:
patent: 2961395 (1952-11-01), Icxi
patent: 3008892 (1957-09-01), Owen
patent: 3048528 (1959-11-01), Covington
patent: 3374159 (1968-03-01), Poole
patent: 3541083 (1970-11-01), Beemer
patent: 3591467 (1971-05-01), Carter
patent: 3619383 (1971-05-01), Eisner
patent: 3629077 (1971-06-01), Gannoe
patent: 4310403 (1981-03-01), Nitto et al.

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