Abstract: Electrolytic galvanizing process in which steel strip to be zinc coated is passed continuously through an acid electrolyte solution containing zinc ions and is used as a cathode, while the electrolyte solution is made to flow in the space between the cathode and the anode, in a cell having flat parallel electrodes. The plating current density and the fluid dynamic conditions of the electrolyte are related by the equationI=K C Re.sup.nin which I is 15-300 A/dm.sup.2, K is 0.01-0.0001 A/dm.sup.2 l/g, C is 40-80 grams of zinc per liter of electrolyte solution, Re is the Reynolds number between 1,000 and 200,000, and n is 0.55-0.85. Preferred values are K=0.001, C=80 g/l and n is 0.7.