RU1798393C - Method for electrochemical cleaning of long-length steal products - Google Patents

Description

The quality of cleaning was assessed by the adhesion of the nickel coating to the wire, the tests were carried out by winding methods according to GOST 9.302-79 ..

To compare the proposed cleaning method with the known one, the same wire was treated in two adjacent baths (0.5 m each) with a 10% NaaSCM solution, first anodically and then cathodically. As electrolytes used sheets of stainless steel and. In order to achieve current density on the wire A / dm2, a current of 6.42 A was applied to both baths. the size of the surface to be treated doubled. The distance between the wires in both cases was the same. The data obtained are summarized in a table.

As can be seen. From the table, the current power supplied to the bath, cleaning, the proposed method is b times lower than the known one. This is explained as follows. When cleaning the wire according to the known method, the current from the source is supplied to the anti-electrodes (steel plates), and not to the wire being processed at all. In this case, the electric circuit is closed according to the circuit; 1st counter-electrode-solution — workpiece — solution — 2nd counter-electrode, according to the proposed method: 1st workpiece — solution — 2nd workpiece. The voltage in each case with equal current strength will only be determined by the resistance of each system, i.e.

U1 (Rel-de + Rr-ra + Nizd + Rr-ra +

 Rel-yes) 11 (2Rel-de + 2Vr-ra + Rizd) And

U2 (Rizd + Nr-ra + Rzd) 12 (2Rizd + Rr-RaH2.

0

5

0

5

0

5

0

however, as can be seen from the formula, two products are processed according to the proposed method, and one is processed according to the known one.

Feasibility study of the proposed method. By connecting both poles of the DC source to the workpiece, energy costs for processing additional electrodes installed in the baths according to the known method are eliminated and 1/2 of the wire in the same bath is processed anode and. 1/2 part of the cathode, in the other In the bath, the sign on the wire is reversed. In this case, each wire is processed both cathode and anode, as in the known method. In order to achieve the same degree of purification by the proposed and known method, which is determined by the processing time and current density, it is necessary by the known method 5-10 times greater electric current power. In addition, the supply of current at the entrance to the first bath and the exit from the second bath also saves energy by reducing the equalization currents compared to the known method.

Claims (1)

The claims The method of electrochemical cleaning of steel lengthy products, including DC treatment in series in two baths with insoluble counter electrodes, reversed during the transition from the first bath to the second bath, characterized in that, in order to reduce energy consumption, processing is carried out when connecting one source current at the entrance to the first bath, another source at the exit of the second bath, and the workpiece is used as the counter electrode. Comparative characteristics of the proposed and known methods Table continuation