What are the methods to improve the hardness of the electroless nickel plating layer? Generally speaking, this involves changing the composition of the electroless nickel plating solution, process parameters or post-treatment. Here are some common methods:
1. Nickel salt concentration adjustment: Increasing the concentration of nickel salt in the chemical plating solution can improve the hardness of the nickel layer.
2. Reduce additives: Certain additives can reduce the hardness of the nickel layer. Reducing the use of these additives can often increase the hardness of the nickel layer.
3. pH adjustment: Properly adjust the pH value of electroless nickel plating solution to make the deposition process more inclined to form a tight crystal structure of nickel layer, thereby increasing hardness.
4. Temperature control: Increasing the working temperature of electroless plating can speed up the deposition rate of nickel and may improve the hardness of the nickel layer, but at the same time, attention should be paid to avoid excessive temperature resulting in quality problems of the nickel layer.
5. Mixing intensity: Increasing the mixing intensity or using more effective mixing methods can improve the uniformity and hardness of the nickel layer, because a more uniform mixing helps to reduce the accumulation of precipitates and impurities.
6. Post-treatment heat treatment: The electroless nickel layer can be increased by subsequent heat treatment processes, such as annealing or aging to optimize the crystal structure of the nickel layer.
In actual production, many electroplating plants often use their own electroless nickel solution, so that the plating hardness is usually not satisfactory, then you can use Bigely electroless nickel plating solution Ni-809, which is a electroless nickel concentrate, the plating hardness can reach 550-650 HK100 .
If you want to know more about electroless nickel plating solution, please feel free to contact us.
