Color-coated plates have been widely used in our lives. This product has good operation, but sometimes paint explosion occurs during use. What are the reasons for this phenomenon? The color-coated unit was coated with the No. 2 water-quenched cover slot, and silt and dust were found. There was dust on the exit inspection mirror, and there was floating dust on the surface of some rollers. Dust will affect the surface quality of Shandong color-coated plate products, especially the quality defects of color plate explosion. The passivation plate temperature production process stipulates that it should be checked every 2 hours, and the passivation plate temperature is not tracked in real time.

When the ambient temperature in winter is 10℃, the temperature of the plate after passivation may change within 2 hours due to the change in ambient temperature, which will eventually cause the Shandong color-coated plate to be scratched and peeled during the pressing process. When mixing the slot, add the passivation liquid first and then add water. When the density of the passivation liquid is higher than that of water, it causes uneven mixing, poor adhesion between the passivation layer and the substrate, and easy to cause the topcoat to have paint explosion quality defects.