When we use electroless nickel plating solution for production, because most of the reducing agents used are hypophosphite, phosphite ions will inevitably be generated in the plating solution.owever, when the concentration of phosphite is high, it will affect the deposition rate of chemical nickel. What range should the concentration of phosphite in the bath be controlled?
According to the field experience and the characteristics of the product electroless nickel plating solution Ni-809, Bigolly Technology made an analysis and found that the phosphite ions in the plating solution would form nickel phosphite precipitation with the nickel ions in the plating solution, making the plating solution turbid.The electroless nickel coating deposited in this way will be rough, with poor brightness, and will catalyze spontaneous decomposition.
In general chemical nickel plating solution, when the concentration of phosphite ion reaches 30g/L, the deposition rate of chemical nickel will be rapidly reduced.When the concentration of sodium hypophosphite in the bath using this medium phosphorus electroless nickel plating solution Ni-809 reaches 60g/L, the bath needs to be replaced.
Bigolly suggested that customers can reduce the concentration of phosphite by retaining the mother solution, that is, when the plating solution with high phosphite ion concentration needs to be replaced, a part of the plating solution can be retained, and then new chemical nickel liquid can be added for production.In this way, the stability of the reaction speed of the plating solution during new slotting can be maintained, and the cost of cylinder opening can be saved.
Therefore, during the production process of using electroless nickel plating solution, the concentration of phosphite ions in the plating solution needs to be analyzed regularly to avoid the high concentration of phosphite ions affecting the production efficiency and reducing the occurrence of failures.If you are interested in the electroless nickel plating solution, please contact the Bigolly customer service for free samples and detailed technical information!
If you want to know more about electroless nickel plating, you can click to view "Common problem".