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.