SU1726174A1 - Electrolyte for electrochemical treatment - Google Patents

Abstract

The essence of the invention: an aqueous solution contains an alkali metal chloride or nitrate or sulfuric acid salt 100-150 g / l and nitromethane 150-200 g / l, the rest water. The inorganic salt is subsequently dissolved, and then nitromethane in distilled water. 2 tab.

Description

The invention relates to processing using electrical energy, namely to electrochemical processing.

The purpose of the invention is to improve the accuracy of processing by reducing gassing in the interelectrode gap.

This goal is achieved by the fact that nitromethane is additionally added to an aqueous solution of sodium chloride in the following ratio of components, g / l:

NaCi150

СНзШа150-200

Н20The rest

The preparation of working solutions is carried out as follows: the calculated amount of sodium chloride is dissolved in distilled water, and then after the salt is completely dissolved in water, nitromethane is dissolved in the electrolyte.

Table 1 shows the experimental data on the current output of hydrogen (the fraction of the total current in%, going to produce gaseous products) depending on the current density for electrolytes 100-150 g / l NaCI, or MaMoz, or NaaSCM and with the addition of nitromethane (SNMOA).

From the data in the table it can be seen that the reduction in cathode gas emission depends only on the change in the amount of nitromethane introduced into the electrolyte and does not depend on the change in the percentage content of the main electrolyte component (for example, NaCl).

To experimentally verify the effect of the proposed composition on the accuracy of the ECHO, stainless steel 12X18H10T was machined. The width of the interelectrode channel (IEC) d 0.5 mm, length 250 mm, electrolyte pumping speed of 4.6 m / s, current density I 20 A / cm2, Determined the relative metal removal along the length of the IEC by the expression Dg / Dgo, where Az - eat metal along the length of the channel; A ZQ - eat metal at the entrance to the channel. The results of the experiments are given in table. 2

As follows from the above data, if the nitromethane content is less than 15.0 g / l or more than 200 g / l, the metal removal rate is reduced, i.e. processing accuracy.

The application of the proposed electrolyte provides increased uniformity

with

with

VI th of

VI

Claims (1)

removal of metal along the length of the processed product and improves the accuracy of processing, the claims of the invention Electrolyte for electrochemical processing on the basis of aqueous solutions of chloride, nitric acid and sulfate salts Nitromethane was introduced as a gas absorption component, and the components were taken in the following ratio, g / l: Chloride or nitric acid, or sulfuric acid salt Table 2