Abstract: This invention relates to a method and apparatus for electrolytically coating, e.g. zinc or tin, one side only of a horizontally moving flat rolled strip or sheet. More specifically, in the practice of this invention, a cathodically charged flat rolled sheet moves horizontally and contiguously above electrolytic cell body solution, and perforated, submerged, insoluble anode member. Fresh cell electrolyte (plating) solution contained within a solution chamber, under pressure, is continuously fed through said perforations. The cell electrolyte body solution extends to the strip edges, drops off, cascades over the edges of the solution chamber into a catch box, is returned to the recirculation system and pumped into the solution chamber. The flat moving strip, whose bottom surface is being electrolytically coated with metal from said plating solution, serves as a solution deflector and causes the solution flow along the strip edges to extend outward in a flat flow pattern.