Patent ID: 7045053

Claim:
Apparatus for the superficial electrolytic treatment of metal strips comprising a plurality of separated and non communicating containers internally defining a longitudinal feed path of metal strip ( 13 ), a plurality of electrode pairs ( 14 ′, 15 ′ 14 ″, 15 ″, 14 ′″, 15 ′″) situated along said path, whereby each electrode is associated with one of said containers ( 2 ′, 2 ″, 2 ′″) the first electrode ( 14 ′; 14 ″; 14 ′″) of each electrode pair r being located above said metal strip and the respective second electrode ( 15 ′, 15 ″, 15 ′″) of said electrode pair being located below said metal strip ( 13 ) in a reciprocally opposite position and at a predetermined distance from said metal strip ( 13 ), each of said electrode pairs having polarity opposite to that of the adjacent pair and being associated respectively with one of said containers ( 2 ′, 2 ″, 2 ″) characterised in that a) there is provided at least one pair of pressure rollers ( 3 ′, 3 ″, 3 ′″) for strip pressing situated in each area between adjacent containers for galvanic separation of the strip surface areas facing the electrodes pairs of opposite polarity, b) said electrodes pairs ( 4 ′, 4 ″, 4 ′″) form a tunnel around the metal strip path producing a high turbulence in the electrolyte flow”, c) each electrode pair is provided at both ends with nozzles in pairs ( 5 , 5 ′, 5 ″, 5 ′″) for spraying the electrolyte on said metal strip.