Abstract: The invention is directed to an electrotreating apparatus, utilizing horizontal-pass electrotreating cells wherein the strip passes through the corridors of one or more of such cells. Electrolyte is caused to flow through the corridor(s) and overflow into a collector tank for recycle through the system. Electrode replacement is facilitated by inserting the electrodes through the outer walls of each corridor. Proper sealing of such electrodes is achieved by utilizing an electrode with a T-shape cross-section, in which the top of the T is a flange for exerting a bearing, liquid-tight sealing force against the outer surface of the corridor wall, while the vertical portion of the T comprises that part of the electrode which is inserted into a hole in the corridor wall.

Abstract: A process for the electrolytic removal of lubricants from steel strip which significantly reduces the amount of power required while enhancing the degree of lubricant removal. The process comprises (i) electrolyzing the strip in an alkaline electrolyte by applying a current density within the range of 350 to 4,000 amps per square foot, and (ii) passing the strip lengthwise, at a speed of 450 to 3,000 feet per minute, between at least one pair of horizontally arranged electrodes in parallel spaced relation wherein the distance between a planar surface of the strip and its respective facing electrode is from one-fourth of an inch and no greater than 11/2 inches. The amount of power required is significantly reduced by flowing the electrolyte co-current with the direction of strip travel at a flow velocity which is from 50 to 100 percent of the strip speed.