In the previous article, we discussed that excessive concentration of hypophosphorous acid would cause the chemical nickel plating solution to undergo natural decomposition. Besides, factors such as nickel salt concentration, pH value adjuster content, etc. would also have an impact on the stability of the plating solution.
The influence of nickel salt concentration
If the concentration of nickel salts in the solution is too high and the pH value is also relatively high, it is likely to form nickel phosphite and nickel hydroxide precipitates, causing the solution to become cloudy and making it very prone to spontaneous decomposition.
The influence of pH adjustant content
Under the condition where other components of the plating solution remain unchanged, if the concentration of the pH adjuster is increased excessively, it is likely to cause the precipitation of nickel phosphite and nickel hydroxide; at the same time, it will also accelerate the decomposition of the reducing agent.
The allowable concentration of phosphoric acid is closely related to the pH value of the solution. As a chemical nickel plating solution manufacturer, the engineers at Bigely conducted research when developing chemical nickel plating products and found that the higher the pH value, the lower the allowable limit concentration of phosphoric acid. Therefore, during the plating process, we recommend controlling the pH value within the range of 4.9-5.1. In this way, the stability of the solution can be guaranteed.
The research results also show that when certain additive components are added to the acidic plating solution, they not only have a complexing effect on nickel ions, but also have the effect of increasing the upper limit of phosphoric acid concentration. The chemical nickel plating solution Ni-809 developed by Bigely is based on these research results. Ni-809 achieves good stability of the solution through the rational combination of various additive components, and can be used stably for 10 to 12 cycles. Moreover, the coating has excellent wear resistance and hardness.
About us
Guangdong Bigely Technology Co., Ltd. ,founded in 2003, is a high-tech enterprise integrating R & D，production, sales and service, specializing in the production of electroplating chemicals. As a fast growing electroplating chemicals supplier in China, Bigely has over 20 years' experience in electroplating additives production and own production base of 5000 square meters. We can produce 15,000 tons of electroplating additives every year, which can fully meet the needs of customers.
If you need our high-quality electroplating additives, please contact us. We can provide you samples for test, and also provide a series of services.
