Nickel plating solution

Abstract

The invention discloses a nickel plating solution, which includes 90-150g / L nickel sulfate, 45-65g / L sodium chloride, 5-12g / L cobalt chloride, 80-130g / L sodium citrate, a 0.5ml / L neutral nickel brightener, and a 35ml / L neutral nickel prepared solution. The making method of the nickel plating solution consists of: for instance in preparation of 1L of the plating solution, adding 500ml of water, conducting heating to 70DEG C, adding 80-130g of sodium citrate, then adding 90-150g of nickel sulfate and 5-12g of cobalt chloride, stirring the materials evenly, performing dissolving to be clear, adding 45-65g of sodium chloride, and performing dissolving to be clear, then adding 35ml of the prepared solution and 0.5ml of the brightener, adding water to 1000ml, and adjusting the pH value to 6.5-7.0. The nickel plating solution provided by the invention can realize direct nickel plating on zinc, the plating layer is full, pure white, bright, and has little smell, also the defect of required operation on a cyanide copper plating layer during traditional zinc alloy nickel plating can be prevented. Thus, the sewage treatment is simple, the cost is saved and a more environment-friendly effect can be achieved.

Description

technical field [0001] The invention relates to a nickel plating solution. Background technique [0002] At present, zinc alloy electroplating with nickel is generally carried out as a primer with cyanide copper plating, and then electroplated with nickel and other coatings. [0003] Cyanide copper plating has disadvantages; [0004] 1. Highly toxic (cyanide is a raw material prohibited by the state). [0005] 2. The working temperature during copper plating is 50-60°C, the working smell is strong, and the environment is harsh. [0006] 3. Due to the large difference in the potential of the two metals, zinc and nickel, the nickel plating solution has always been very sensitive to zinc pollution, and the presence of a little zinc ions will easily cause blackening of the nickel plating. When the zinc content reaches 0.02g / L or more, the stress of the coating increases, becomes brittle, and black stripes appear, and even the coating is completely black. Nickel plating after...

AI Technical Summary

Problems solved by technology

[0003] Cyanide copper plating has disadvantages;

[0004] 1. Highly toxic (cyanide is a raw material prohibited by the state)

[0005] 2. The working temperature during copper plating is 50-60°C, the working smell is strong, and the environment is harsh

[0006] 3. Due to the large difference in potential between zinc and nickel, the nickel plating solution is always sensitive to zinc pollution, and a little zinc ions will easily cause blackening of nickel plating

However, the potential difference between zinc and nickel is very large, and direct nickel plating on zinc has always been a difficult problem that electroplaters dream of solving.