In the production process of using amino sulfonic acid nickel plating additives, we often encounter the problem of high brittleness of the coating, which affects the mechanical properties of the coating. So what causes the brittleness of the coating?
Bigely Technology has conducted an analysis based on on-site experience and product characteristics, mainly focusing on the following four points:
1.Excessive amount of brightener. Some functional workpieces do not require bright coating when plating nickel aminosulfonate. When adding brightener, the amount should be added according to the lower limit of the process range. If the amount is added according to the upper limit, the brightener in the plating solution will be excessive over time, and the coating will be relatively bright and brittle. When the concentration of brightener in the plating solution is high, an appropriate amount of softener and wetting agent can be added to reduce the brittleness of the coating.
2.The concentration of nickel chloride is high. In the nickel aminosulfonate process, the brittleness of the coating is relatively high when the concentration of nickel chloride is high. Generally, the concentration of nickel chloride should be controlled to be lower, preferably below 10g/L.
3.The current needs to be buffered. In the general nickel aminosulfonate process, the current needs to be buffered, that is, the rectifier needs to be soft started, and the buffering time is about 1 hour. When buffering, be careful not to let the current be too high.
4.The plating solution temperature is low or the nickel ion concentration is low. During production, if the temperature of the plating solution is low or the concentration of nickel ions is low, the conductivity of the plating solution is poor, and the stress on the coating will be relatively high. In this situation, the temperature of the plating solution should be appropriately increased or the concentration of nickel ions should be increased to reduce the stress on the coating.
Therefore, in the production process of using sulfamic acid nickel plating, we should pay attention to the above four points to avoid the phenomenon of nickel brittleness and better use sulfamic acid nickel plating additives. If you are interested in amino sulfonic acid nickel plating additives, please contact Bigely customer service for free samples and detailed technical information!
