About powder spraying
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Does anyone know why the workpiece should be oxidized before powder spraying? What is the relationship between oxidation and powder spraying? What is the general requirement for drying temperature after powder spraying? Will incompletely cured powder easily cause cracking?
The powder spraying temperature is generally about 200 degrees. The powder layer that is not completely solidified is easy to powder. It seems to be slag, and the powder will fall off as soon as you apply it.
personal understanding: In order to improve the adhesion of the coating when the workpiece is oxidized before applying powder coating ； The processing temperature of powder coatings is around 180 degrees, and generally does not exceed 200 degrees (temperatures above 200 degrees should be used with caution, because the temperature resistance of conventional powder coating pigments is generally not considered when selecting processing temperatures exceeding 200 degrees) ； Powder that is not fully cured will definitely have problems with adhesion.