A kind of near-neutral electric brush plating silver-plating solution and its preparation process and application method

Abstract

The invention provides a near-neutral brush plating silvering solution and preparation and use methods thereof. The near-neutral brush plating silvering solution per litre is prepared form, by mass concentration, 20-45 g of silver nitrate, 90-150 g of potassium pyrophosphate, 6-12 g of methanesulfonic acid, 15-30 g of imidazole, 25-40 g of ammonium nitrate, 25-35 g of ammonium sulfate, 15-27.5 g of NH3.H2O, and a compound additive. The compound additive is prepared from 15-25 parts of polyethylene glycol, 25-40 parts of ethanediamine, 8-12 parts of fatty alcohol polyoxyethylene ether, 0.25-0.475 part of dimercaptobenzothiazole, 40-52 parts of ethanol, and 25-40 parts of deionized water. The near-neutral brush plating silvering solution has the advantages of a stable chemical property, non-toxicity and environmental friendliness; a silvered metal layer with excellent electrochemical performance, uniform structure, compactness and strong adhesion is formed on the surface of a copper-based material; the operation is simple and convenient; the preparation cost is low; and the near-neutral brush plating silvering solution is suitable for large-scale industrial applications.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a near-neutral brush-plating silver-plating solution and a preparation process and application method thereof. Background technique [0002] The existing domestic power system operating equipment is developing towards high voltage, high frequency, high power, high current, intelligence and long life. Based on the good electrical conductivity, thermal conductivity and environmental adaptability of pure copper materials, copper bars are used in large The application in power equipment is also becoming more and more popular, and it is an indispensable conductive material. The surface of industrial copper-based materials used in power equipment is easily oxidized when exposed to the air, and its oxide seriously affects the conductivity of copper-based materials. Copper bars, copper plates, and copper busbars in power equipment are decorated with metal plating su...

AI Technical Summary

Problems solved by technology

[0004] In the existing brush-plating silver-plating technology, on the one hand, there are many brush-plating processes, including steps such as impurity removal, electro-cleaning, activation, pre-plating, and aging. Due to many processes, various equipment and chemicals need to be prepared, which is not conducive to On-site development of electrical equipment repair work

On the other hand, the adaptable temperature of the traditional brush plating silver plating solution system is relatively low. When the operating temperature exceeds 30°C, the plating solution tends to become turbid and precipitate, and the appearance of the obtained coating appears foggy, gray spots, pinholes, and pitting. Or the storage time of the pure plating solution is short, and the brush plating process is more complicated and industrialized, and it is more difficult to industrialize.

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