Abstract: An apparatus for electrotreating a metal strip and employing an electrode roll having a metallic outer surface covered by a porous mesh layer composed of electrically non-conductive material and fixedly secured to the outer surface of the electrode roll.

Abstract: An electrocoating apparatus located totally above a bath of electrolytic liquid and comprising a depletable anode roll having an outer layer of coating metal. Another roll is axially parallel to and vertically spaced from the anode roll. A closed loop of electrically insulative, porous mesh material extends around a portion of the peripheral surface of each roll to form the closed loop. A strip of metal is wrapped around a portion of the anode roll, with the porous mesh interposed between the strip's inner surface and the anode roll's peripheral surface. There is an upstream nip between the strip and the anode roll. The two rolls and the mesh loop are rotated, and the metal strip is advanced in a downstream direction, all at the same speed. Electrolytic liquid is introduced at the upstream nip and is retained between the anode roll and that part of the strip which is wrapped around the anode roll. Metal is coated on the inner surface of the strip, and the anode roll undergoes depletion.

Abstract: 1.