SU1035097A1 - Copper plating electrolyte - Google Patents

Abstract

EDEYASTROLITIS NEEDAIA, with the support of a servokiyo copper, r vyuks d. sodium and glycerin on tl and h ay "and with the fact that, with the aim of increasing the yield on the durability of the bond strength of noKjamia due to a standard underburning, it also gives rise to

Description

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The invention relates to galvan stegia, in particular to the electrolytic deposition of copper coatings. Copper electrolyte is known, containing sulphate, copper, sodium hydroxide, gum, tartrate sodium, and water. The electrolyte has a good scattering ability. C 13 "The disadvantages of this electrolyte are coarse grains of copper coating and the absence of durable coating of steel-based coating. The most close to the invention in technical terms and the achieved effect is copper-plating electrolyte containing sulfate. Copper, potassium hydroxide, glycerin , trisubstituted sodium phosphate and potassium-ferrocyanide, however, the electrolyte current yield does not exceed 60%, and the resulting coatings do not adhere sufficiently strongly to the substrate. The purpose of the invention is to increase the current yield of the metal and the adhesion strength of the coating to the steel substrate. This goal is achieved by the fact that the copper electrolyte, containing copper sulfate, sodium hydroxide and glycerin, additionally contains melamine (2.4, b-triamino-1,3,5-triazine in the following ratio of components, g / l: 60 Sodium hydroxide 90-110 Glycerol40-60 Melamine (.2,4,6-triamino-1, 3,5-triazine} 0.4-0.6 The electrolyte is prepared as follows. The calculated amounts of salts are dissolved in separate portions x water. Then, to a solution of sodium hydroxide at a temperature not higher than 40 s and mixing are added sequentially glycerin, sulfuric acid Copper and melamine layer. Electrolysis is recommended at 10-30 ° C and cathodic density; current 0.5-2.0 A / dm. At the same time, cathode current efficiency is 8595%, dissipative capacity (according to Hering-Blum method) 50-70%. Three electrolytes were prepared for testing, containing, respectively, g / l: Electrolyte 1 Sulfurous copper 40 Sodium hydroxide 90 Glycerol40 Melamine 0.4 Electrolyte 2 Sulfuric acid 60 Hydroxide sodium 110 Glycerin60 Melamine 0.6 Electrolyte 3 Copper sulfide 50 Sodium hydroxide 100 Glycerin 50 MelaminO, 5 Electrolytes are examined by electrolysis in op edelennyh temperature ranges, the cathodic current density with the determination of current efficiency, scattering ability and strength of adhesion with steel backing according to GOST 16875-71. The results are shown in table 1. The electrolysis can be carried out without stirring in a stationary mode and with stirring in the drum and bell baths. The temperature is 20-25 C. It is recommended to work out the freshly prepared electrolyte A-h / l and then periodically adjust all components. The technology of preparing the parts before coating does not differ from the usual one. Comparative data of the proposed electrolyte and prototype are presented in table. 2. The invention should be used in industries where it is necessary to obtain crystalline copper coatings strongly bonded to the steel base. . Copper electrolyte is environmentally friendly. It has high technological parameters. Table 1

95-85 50-70

10-30

0.5-2

Table

Claims (1)

COPPER ELECTROLYTE, containing copper sulfate, hydroxide. sodium and glycerin; It is important that, in order to increase the current efficiency of the metal and the adhesion of the coating to the steel substrate, it additionally contains melamine (2,4,6-τρίΗ »βΐΗο-1,3, 5 -tryazinum) at the next otioisation of components, g / l "Sulfuric acid copper 40-60 Sodium hydroxide 90-110 Glycerin 40-60 Nelamn (2,4,6-triamino-1,3,5-triaeiv) 0.4-0.6>