Nickel plating method for electroplating bright nickel silver

Abstract

The invention relates to the technical field of surface treatment, and in particular relates to a nickel plating method for electroplating bright nickel silver. The method comprises the following steps: polishing; deoiling; microetching; electroplating bright nickel; washing with sulfuric acid; pre-plating silver; plating silver; washing with water; and drying, wherein the roughness of the polished surface of a raw material is not beyond 4 microns; 10% AD-482 deoiling agent is used; a microetching solution per liter comprises the following components: 60g of sodium persulfate, 20ml of sulfuric acid, and the balance water; a nickel electroplating solution per liter comprises the following components: 75-85g of Ni, 12-17g of Cl<->, 45-55g of boric acid, 180-220ml of bright nickel brightening agent, 20-35ml of wetting agent, and the balance water; a silver pre-plating solution per liter comprises the following components: 0.5-1.0g of Ag, 90-130g of editpotassium cyanide, and the balance water; a silver plating solution per liter comprises the following components: 20-40g of Ag, 110-150g of editpotassium cyanide, 90-110g of potassium carbonate, 40-60ml of NI-6160-B brightening agent, 15-25ml of NI-6160-C additive, and the balance water. The raw material processed by the method is high in surface uniformity; a plating layer cannot fall off; the abrasion resistance is high; the applicable scope is wide; and the light reflectivity is increased.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a nickel plating method for electroplating bright nickel silver. Background technique [0002] Electroplating refers to a surface processing method in which in a salt solution containing the metal to be plated, the base metal to be plated is used as the cathode, and through electrolysis, the cations of the metal to be plated in the plating solution are deposited on the surface of the base metal to form a coating. . [0003] Most of the existing electroplating processes are single metal plating, such as silver plating, copper plating, zinc plating, etc. After silver plating, the surface of the workpiece tends to turn black and purple. In order to solve the surface discoloration of silver-plated workpieces, although the prior art can have a special anti-silver discoloration agent, which can delay the discoloration of the surface of silver-plated workpieces, it still can...

AI Technical Summary

Problems solved by technology

The surface of the workpiece is easy to turn black and purple after silver plating

In order to solve the surface discoloration of silver-plated workpieces, although the prior art can have a special anti-silver discoloration agent, which can delay the discoloration of the surface of silver-plated workpieces, it still cannot fundamentally solve the problem of discoloration of the surface of silver-plated workpieces.

[0004] There is a two-layer electroplating process in the prior art, such as plating a layer of nickel on the silver-plated outer layer of the workpiece, which can improve the surface discoloration of the silver-plated workpiece. At the same time, nickel plating can improve the surface strength of the workpiece and increase the surface area. Wear resistance; but because the existing two-layer or multi-layer electroplating process is not perfect enough, the surface treatment is uneven, the hardness is low, the wear resistance is poor, and the electroplating layers of the workpiece are easy to fall off, and the surface light reflectivity is low, which cannot meet the market demand.