Defects of coating

Colored spots / impurities in the coating

If you encounter this problem after the powder coatings have cured, perform a step-by-step check of the technology parts mentioned below.

 

    Compressed air

    • moist compressed air
    • impurities in the compressed air
    • oil in the compressed air

    Application equipment

    • impurities released from poorly maintained equipment
      • powder hoses
      • ejector blocks
      • powder coating guns

    Paint (powder coating)

    • impurities introduced in the powder coating:
      • while handling the powder coating
      • from the equipment during powder coating recycling
    • manufacturing defect of powder coating

    Part and its hanging before entering the paint booth

    • impurities adhered to the product before powder coating application:
      • insufficient surface pre-treatment
      • impurities in the drying oven

    Curing oven

    • impurities from the oven
    • impurities released from the conveyor

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