As industrial-grade water circulates at coke plants, its content of hard salts gradually increases. Consequently, deposits form on the inner surfaces of the heat exchangers. At present, inhibitors are widely used to prevent such salt deposits. To assist in selecting the optimal inhibitor for the coke-plant water cycles, research is conducted at OAO Koks on OOO Ekoenergiya and Akvarezalt inhibitors. The results show that the inhibitors do not completely protect the equipment from salt deposits and corrosion. Residues gradually build up, and constant monitoring of the circulatory water is required, with precise dosing of the corresponding quantity of inhibitors. To find alternative means of water preparation, the protection of heat exchangers from hard-salt deposits by means of an electric field is investigated in the laboratory. The results show that this method is effective. In addition, it permits the removal of hard salts from the circulatory water and requires no reagents, no complex equipment, and no special monitoring laboratories. Thus, electrical treatment of water is a promising means of preventing hard-salt deposits in coke-plant water cycles.