In the production process of using nickel plating brightener, we sometimes find that the iron ions in the plating solution are relatively high,The brightness of the produced workpiece is relatively poor, and it is prone to yellowing and whitening,And after a few days of hydrogen peroxide treatment, this phenomenon appeared again. What is the reason?
Bigolly Technology made an analysis based on the field experience and the characteristics of the product's nickel plating brightener Ni-301,When the iron impurity in the plating solution is high, the iron hydroxide will precipitate and be mixed in the plating layer, which is easy to make the plating layer brittle.When the concentration of iron ions in the plating solution is high, three points should be paid attention to:
1. The introduction of rust on the surface of the workpiece.The workpieces in some factories are not pickled as needed, but soaked in clean water after pickling in the early stage, so that there is already floating rust on the surface of the workpiece during electroplating.Although the floating rust will not affect the bonding force of the workpiece, the floating rust will dissolve into iron ions in the plating solution.
2. The workpiece fell into the plating tank and was not salvaged in time.In some production lines, the workpieces fell into the plating tank during the production process and were not salvaged in time, so that the workpieces would dissolve in the plating solution, resulting in a high content of iron impurities in the plating solution.
3. The workpiece is still immersed in the plating solution when the equipment fails.Sometimes when the equipment fails, the workpiece is immersed in the plating solution for a long time without being taken out, and the workpiece will be dissolved by the plating solution, resulting in a high content of iron impurities in the plating solution.Therefore, when the equipment fails, the workpiece should be taken out of the plating solution immediately.
Iron ion is a relatively common metal impurity, and it is also a more difficult impurity to deal with.In the production process of using nickel plating brightener, we should pay attention to these small details, and regularly do electrolytic treatment or hydrogen peroxide treatment of the plating solution to reduce the accumulation of iron ions in the plating solution and reduce the failure rate.