We use high sulfur nickel additives to obtain a very thin nickel plating layer between the bright nickel layer and the semi bright nickel layer, which has much higher activity than the other two layers. The potential difference between the high sulfur nickel layer and the bright nickel layer can be increased by at least 20mv, which can improve the anti-corrosion effect of the nickel layer. What should we do if we deposit high sulfur nickel in the coating but the potential difference of the nickel layer does not increase?
Bigely Technology has conducted an analysis based on on-site experience and product characteristics, mainly for the following three reasons:
1. The pH value of the high sulfur nickel plating solution is too low. The quality of the coating is closely related to the pH value. A low pH value can affect the potential difference effect and also affect the corrosion resistance of the coating. The pH value of the plating solution should be controlled within the process range during production.
2. The sulfur content of the coating is too low. Under normal circumstances, the sulfur content of the high sulfur nickel layer should be controlled at 0.15~0.2%, which can control the potential difference of multiple layers of nickel. When the sulfur content is too low, the potential difference of the coating cannot be increased, so the sulfur content of the coating should be controlled during production.
3. The quality of high sulfur nickel additives is poor. Some additives on the market have poor quality, and the potential difference of the coating will gradually decrease during the production process. It is recommended to use the Ni-320 high sulfur nickel additive from Bigley Technology, which has good chemical stability and can stabilize the potential difference of the coating without decreasing, maintaining the potential difference between the bright nickel layer and the semi bright nickel layer at 160-180mv.
So, choosing a high-quality high sulfur nickel additive, controlling the pH value of the plating solution and the sulfur content of the coating, can stably control the potential difference and corrosion resistance of the coating. If you are interested in high sulfur nickel additives, please contact Bigely customer service for free samples and detailed technical information!
