High temperature nickel additive is applied to the process of plating a nickel sulfamate base layer on continuous plating, followed by pure tin plating. This additive allows the workpiece to pass the high temperature reflow test without discoloration of the plated surface. So how should this high temperature nickel additive be managed during the use of each component of the plating solution?
Bigely Technology has done the analysis based on the field experience and the characteristics of the product, mainly these 7 points:
1. Nickel sulfamate. It is mainly to provide a source of nickel ions, its concentration needs to be kept within the process range, the production should be added according to the loss of nickel sulfonic acid to supplement nickel ions.
2. Nickel chloride. It can increase the conductivity of the plating solution, the uniformity of the coating and speed up the anodic dissolution, and the concentration should be analyzed regularly during the production process and should be within the process range.
3. Boric acid. Boric acid is a buffer, which can avoid large fluctuations in pH value during electroplating and can also reduce the phenomenon of high current burning. The specific concentration of boric acid should be analyzed frequently during the production process and should be within the appropriate range for this purpose.
4. High temperature nickel additive Ni-3000. Ni-3000 is an easy to operate and titrable additive, which can significantly reduce the internal stress of the coating, increase the weldability, resist high temperature, high nickel plating efficiency, and obtain a good solderability and appearance of the coating.
5. Nickel wetting agent Ni-382. Ni-382 can reduce the surface tension of the plating solution and reduce the production of pinholes. Under normal circumstances, the operating concentration is controlled at 1.0~2.0ml/L.
6. Temperature. The bath temperature should be controlled at 50~60℃, more than 60℃ when the bath evaporation loss is larger, and sulfamic acid will be hydrolyzed into sulfate, the coating is easy to brittle.
7. Current density. The current density of Ni-3000 is 3~10A/dm2, the deposition rate is poor when the current density is low, the internal tension of the coating will increase, and it is easy to produce burning phenomenon. When the current density is high, it is necessary to cooperate with strong stirring to maintain good coating quality.
In this way, we know that during the use of high-temperature nickel additives, the management method of each component of the plating solution can effectively improve production efficiency. If you are interested in high temperature nickel additives, please contact Bigely customer service for free samples and detailed technical information!
