In the process of using zinc nickel alloy color passivator, sometimes the passivation film of the workpiece after passivation is not firm, and it is easy to be wiped off.What causes this?
According to field experience and the characteristics of zinc nickel alloy color passivator Zn-324, Bigolly Technology has made analysis, mainly including the following two points:
1. The zinc content of zinc nickel alloy layer is high.When the current density is small in the electroplating process, the zinc deposition will be faster and the nickel deposition will be slower, so the zinc content in the coating will be higher;In addition, when the nickel ion concentration in the plating solution is low, the zinc content in the coating will be relatively high.Therefore, we should control the nickel content and current density parameters in the zinc nickel alloy plating bath during production.
2. The operating parameters of passivation solution are improper.Because the pH value of the passivation solution is too low, the temperature is too high, or the passivation time is too long, the adhesion of the passivation film is poor.Therefore, we control the process parameters of the passivation solution in the production process to ensure the quality of the passivation film after the workpiece passivation.
In this way, when we use the zinc nickel alloy color passivator, the passivation film of the workpiece is not firm and easy to be wiped off, we can consider from these two aspects to solve the problem as soon as possible.If you are interested in zinc nickel alloy color passivator, please contact Bigolly customer service for free samples and detailed technical information!
If you want to know more about zinc nickel alloy,you can click to view "Common problem".