In bright potassium chloride galvanizing process, the pH value of plating solution is one of the key factors affecting the selection of current density. Bright potassium chloride galvanizing is a galvanizing method with additives to produce bright coating. In this process, the correct pH value is important to obtain good coating characteristics.
The following is the possible effect of the pH value of the plating solution on the current density in the bright potassium chloride galvanizing process:
1. Increase pH value:
① A higher pH value (alkaline) usually helps to improve the brightness and flatness of the coating.
② It can reduce the evolution of hydrogen and reduce the risk of hydrogen embrittlement of the workpiece.
③ A lower current density may be required to avoid rough coatings or unnecessary hydrogen pores.
2. Reduce pH:
① A lower pH (more acidic) may result in a higher current efficiency, helping to speed up deposition rates.
② Higher current densities may be required to maintain the growth rate of bright coatings.
③ Too low pH may increase hydrogen evolution, which can cause hydrogen embrittlement problems, and may lead to hydrogen bubble holes or other defects in the coating.
In the actual production process, in order to obtain a coating with both good appearance and suitable physical properties, the production personnel need to closely monitor the pH value and current density of the bath, as well as regularly check the concentration of additives in the bath and other key parameters.
When using Bigely potassium chloride galvanizing brightener, these parameters need to be adjusted according to different production requirements and bath conditions to ensure the quality and consistency of bright coatings. In general, Bigley provides guidance on the use of brighteners at specific pH values and current densities, or if you have further questions, you can consult our technical engineers.
If you want to know more about potassium chloride galvanizing brightener, please feel free to contact us.
