Abstract: A metal strip is electrolytically treated by using an apparatus having:a vessel for defining an electrolytic treatment space for a metal strip;a plurality of conductor rolls arranged along a path of movement of the metal strip extending through the treatment space;at least one pair of electrode pads, each pair of electrode pads being located between two conductor rolls and being spaced from and facing each other with the path of movement of the steel strip therebetween, and each pad being provided with at least one slit through which an electrolyte is ejected toward the surface of the metal strip under conditions adquate for creating a static pressure of the ejected electrolyte sufficiently high for holding the metal strip in its path in the gap between the electrode pad and the metal strip, and;a voltage supply for applying voltage between at least one of the conductor rolls and the electrode pads.