SU933357A1 - Electrolyte for electrochemical machining - Google Patents

Description

(54) ELECTROLYTE FOR ELECTROCHEMICAL MARKING

The invention relates to electrophysical and electrochemical processing methods, in particular, the purpose of electrochemical marking of products, mainly stainless steel, Blk} (with the first technical solution is an electrolyte for electrochemical marking of products based on an aqueous solution of sodium nitrite and sodium nitrate, including triethanolamine as anti-corrosion additive IJ. Electrolyte due to the anti-corrosion additive triheganolamine reduces the corrosive effects on marked products / w and equipment. The quality of marks marked with such an electrolyte is low. This can be explained by the fact that a relatively large amount (2-3%) of triethyapamine is introduced into the electrolyte. As is known, trietanopamine has strongly pronounced silk properties and absorbs air (see the Chemical reagents and preparations Goskhimizdat, 1953, p. 510). Filling the electrolyte with gas — CO reduces the color intensity and the clarity of the marking marks. When marking stainless steels, the signs are steel-colored, slightly contrasting. The aim of the invention is to improve the quality of marking of stainless steel products due to the intensification of the color of the marked marks. This goal is achieved by the fact that the electrolyte for an electrochemical grade {product product based on an aqueous solution of sodium nitrite, sodium nitrate and triethanolamine additionally contains ferrocyanide, and the components are taken in the following ratio, wt.%: Sodium nitrite4-8 Sodium nitrate. 0.6-1 Trnethanolamine 0.5-0.9 Potassium zhelezosinero2, 5-6.5 Vdisty The rest was Water Introduced into the proposed composition of the potassium electrolyte, the pezinosinerodisty serves as a color-forming substance, which forms an insoluble, stable dark film on the marked surface and is iron hexacyanoferrate Fe -CFeCCH j, The intensity of the color of the marked marks increases sharply. The proposed electrolyte was tested on flat samples of stainless step X18H10T. Marking was carried out on a model 4401 electrochemical installation. monolithic electrode tool. 933357 For each experiment, the marking modes are the same: Electrolyte temperature, ®G Voltage at the electrodes, In the interelectrode gap, mm Marking time, s Prepared 12 electrolyte compositions, Three compositions - according to the authors. St. No. 276673 (see table) and 9 compositions according to the proposed recipe, Supplementary) up to 1OO% of the components were water. Each electrolyte composition was prepared separately. The components were mechanically mixed and dissolved with water. The test results are shown in the table.

It can be seen from the table that the labeling with the proposed ejectropite is 4–10 times higher than that of the known electrolyte, and when marking with the proposed electrolyte, a high optical density and contrast of signs are obtained due to the intense color of the film forming them.

Optimal addition of potassium zhelezosinerodOstogo and inhoggs within 2.54, 5 wt.%.

With a further increase in its amount, the optical density and contrast of the signs change little, but the marking depth slightly decreases.

The order and techniques for performing an electrochemical marking process using the proposed electrolyte do not change.

The introduced component is inexpensive and widely available. The proposed electrolyte does not have a corrosive effect on the marked products and equipment. ITS can be used for marking, without pumping and pumping through the interelectrode gap.

The use of the invention in industry will improve the quality of marking on advanced stainless steel products. Cut consumption

the more expensive component is triethanolamine. The use of the invention in mass production will give an economic effect of 40 thousand rubles. in year.

F

formula invented by

The electrolyte for the electrochemical marking of stainless steels based on an aqueous solution of sodium nitrite, sodium nitrate and triethane-nolamine, characterized in that, in order to improve the quality of marking due to the intensification of the color of the marks, the electrolyte additionally contains potassium iron-synergic, with the following ratio of components, weight. %:

Nitrogen Sodium 4-8 Nitrate Nat1M1Y 0.6-1 Triethanolamine0.5-0.9

Kapiy zhepezosinerodisty2, 5-6,5

WaterEverything

Sources of information received in the course of examination

1. Copyright certificate CGCP № 276673, cl. From O9 to 13/00, 1968.

Claims (1)

Formula invent t'e n and i o Electrolyte for Electrochemical "0 labeling stainless steels based on an aqueous solution of sodium nitrite, sodium nitrate and triethanolamine, about Whitlock and sistent in that, to improve the quality mark ¹⁵ tion by intensifying color markable characters, the electrolyte further comprises potassium ferricyanide, with the following ratio of components, wt.%: 20 Sodium nitrate 4-8 Sodium nitrate 0.6-1 Triethanolamine ₍ 0.5-0.9 Potassium iron-ferrous 2.5-6.5 25. Water Else