Abstract: A significant decrement of the rate of accumulation of scale on electrode and other inner surfaces of a sea water electrolyzer of an electro-chlorination plant, is achieved by intermittently ejecting pressurized sea water through arrays of nozzles that produce energetic (high speed) jets adapted to encroach deep inside the interelectrodic gap spaces of an elongated pack of planar parallel interleaved electrodes. The kinetic energy of the jets is gradually absorbed by the process liquid flowing through the gap spaces from the inlet end to the outlet end of the tubular casing of the electrolyzer containing the elongated electrode pack.