According to my experience in using galvanizing brightener, this is mainly because the cloud point of the potassium chloride galvanizing brightener you are using is too low. When the temperature is high in summer, the plating solution The emulsifying ability of the plating solution is reduced, and the plating solution is easily turbid. At this time, the brightener cannot play its role, and oil beads will precipitate on the liquid surface. Therefore, we should be careful when choosing brighteners. We should choose ones with a high cloud point, such as Bigley's Zn-198, so that similar phenomena will not affect production.