In the process of using zinc nickel alloy brightener, we need to control the concentration of zinc ion, nickel ion and sodium hydroxide in the bath to obtain protective zinc nickel alloy coating with high decorative and corrosion resistance.Sometimes the nickel content in the coating of the workpiece is too high. What causes this?
According to field experience and the characteristics of alkaline zinc nickel alloy brightener BZ-617, Bigolly Technology has made analysis, mainly including the following three points:
1. The nickel ion concentration in the plating solution is high.The concentration of nickel ions in zinc nickel alloy plating solution will affect the nickel content in the coating.In the production process, we should regularly analyze the nickel ion concentration in the plating solution. When the nickel ion concentration in the plating solution is high, we should dilute and adjust the plating solution in time to keep the nickel ion concentration within the process range.
2. The zinc ion concentration in the plating solution is low.When the concentration of zinc ions in the bath is low, the proportion of zinc and nickel in the bath will be affected, so the zinc content of the coating will be low while the nickel content will be high during the deposition process.In the production process, we can increase the area of zinc anode appropriately to increase the zinc ion concentration in the plating solution.
3. The concentration of complexing agent in the plating solution is high.The complexing agent can complexe nickel ions in the plating solution, prevent nickel hydroxide precipitation in the plating solution, and accelerate the dissolution of nickel ions.In the production process, we should control the concentration of complexing agent, and dilute the plating solution appropriately when the concentration of complexing agent is high.
Therefore, when we use zinc nickel alloy brightener, the nickel content in the coating is on the high side, we can solve the problem from the above three points. During production, we should control the concentration of zinc ions and nickel ions in the plating solution to ensure the content of zinc and nickel in the coating.If you are interested in zinc nickel alloy brightener, please contact the 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".
