When we use semi-bright nickel plating additives for production, sometimes the composition of the plating solution and process parameters are within the normal range, but the deep plating ability of the plating layer is poor and there are pinholes. What should we do?
Bigolly Technology made an analysis based on the field experience and the characteristics of the semi-bright nickel plating additive Ni-331.When the deep plating ability of the coating is poor and there are pinholes, two points should be paid attention to:
1. Insufficient Ni-331C supplements.Ni-331C supplement can improve the tolerance of the plating solution to impurities and prevent the generation of pinholes.Too much supplement will cause coating stress, and insufficient supplement will affect the flatness and brightness of the coating.Therefore, we should add supplements at 50 ml/kAh during production.
2. Insufficient Ni-382 wetting agent.Ni-382 wetting agent can reduce the surface tension of the plating solution, making it difficult for hydrogen to stay on the surface of the cathode, thereby preventing the formation of pinholes.The addition amount of Ni-382 wetting agent is 2ml/L, which is especially suitable for the production of semi-bright nickel process.Many similar products on the market are not only ineffective, but also prone to impurities that produce streaks, poor adhesion and embrittlement of the coating.In the production process, we should regularly check the concentration of the wetting agent, and add a small amount of it several times after diluting it with 2~3 times of water.
Therefore, when we use semi-bright nickel plating additives in the production process, when the deep plating ability of the coating is poor and there is pinhole phenomenon, we should make adjustments in time to reduce losses.If you are interested in semi-bright nickel plating additives, please contact Bigolly customer service to get free samples and detailed technical information!
If you want to know more about nickel plating, you can click to view "Common Problem".