In the process of using potassium chloride zinc plating additives, sometimes the surface of the workpiece is blackened after passivation, which will seriously affect the appearance quality of the workpiece, and the performance quality of the coating is also very poor. What is the cause of this phenomenon What about?
In the process of using Acidic zinc plating additives, the potassium chloride in the plating bath mainly plays a conductive role. During the production process, the concentration of potassium chloride in the plating bath must be strictly controlled.
In the process of using acid zinc plating brightener, sometimes we find that the coverage of the zinc coating of the produced workpiece is poor, especially if the coating is thin or there is no coating in the blind hole or recess of the workpiece, what is the cause?
Some customers reported that when the temperature is higher, the bath temperature will be higher. At this time, the workpiece zinc coating will appear white and not bright, and the amount of alkaline zinc plating brightener used will be relatively large. What is the reason for this?
The zinc bath or zinc pot used for hot-dip galvanizing generally uses low carbon steel with very little carbon content. This is to reduce alloying and hot corrosion during use. If the material of the zinc pot is used improperly, it will greatly shorten the use of the zinc pot.