Paint Problems and Solutions

Paint Problems & Solutions

Adhesion Problem After Curing

• The powder coating may not have been baked enough, check it.
• Paint thickness may be too much, reduce paint spray capacity.
• The surface to be painted may not have been cleaned sufficiently, check cleaning agents and tools.
• Contact the paint manufacturer.

Non-Standard Color Formation at the End of Dyeing

• Check the paint thickness, increase it if the thickness is thin.
• Make sure the paint thickness is uniform.
• Check the air circulation conditions in the oven chimney and oven.
• Check the paint used by trying it in another oven. If the paint comes out as desired, it means there is a fault in the other oven.
• The covering ability of the paint may not be sufficient, contact the paint manufacturer.

Orange Look

Check the paint thickness and make sure it is 60-70 microns.

Oven heating speed may be slow, check the oven.

Voltage may be high, optimize.

The paint may be too reactive or too coarse; contact the paint manufacturer.

Perforation and Gas Release in Painted Film

Check the paint thickness, if the paint thickness is over 100 microns, reduce the paint thickness.

The surface to be painted may be wet, check the dryer and filters.

If you don't have an air dryer, be sure to have it installed.

It may be caused by moisture in the paint. Check the storage conditions and the humidity in the air carrying the paint.

If the material is porous, such as casting or galvanized surface, preheat the material.

Contact the paint manufacturer and ask for powder paint that has properties for surfaces with off-gassing.

Low Resistance to Chemical Substances

It may be caused by insufficient baking, check the curing temperature and time.

If the user desires resistance to solvents, contact the powder coating manufacturer and request paint that is resistant to these solvents.

Low Resistance to Corrosion

• Surface treatment may be inadequate, check surface treatment and equipment.
• It may be caused by insufficient baking, check the curing temperature and time.
• Contact the powder coating manufacturer and ask for recommendations to improve corrosion resistance.

Insufficient Surface Hardness

• Check whether the baking is sufficient, if the oven is not adjusted, move it to the desired position, increase the temperature and time as the material thickness increases. If the problem cannot be solved, contact the company.

Crater Formation

• Any foreign substance that changes the surface tension may create a crater on the surface to be painted (silicon, welding gas, heavy perfume, oil, mixing with different paint, etc.), remove the foreign substance in the environment.
• Prevent external factors by creating positive pressure in the painting booth.
• Craters may form due to incompatibility with other paint. Clean the painting booth thoroughly.
• It may be due to paint, contact the manufacturer.

Formation of Different Thicknesses on Dyed Film

• If the shape of the painted part is too uneven, change the gun and sling position.
• Check the distance of the gun from the part being painted.
• If the gun air accumulates paint in some areas, adjust the air loading.
• Check grounding, make sure the hangers are clean.
• It may be due to the fine powder coating particle size.
• Check the recycling dye ratio, reduce it if it is high.

Low Impact Strength

• Check whether the baking is sufficient, if the oven is not adjusted, move it to the desired position, increase the temperature and time as the material thickness increases.
• Check the paint thickness, reduce it if the thickness is too high.
• Check that surface cleaning and pre-treatment has been carried out correctly.
• It may be due to paint, contact the manufacturer.

Insufficient Powder Flow

• The air carrying the powder paint may be insufficient. Try again by increasing the air pressure.
• If there is dust in the powder paint boiling chamber, reduce the powder boiling air pressure.
• Hoses may be crushed, kinked or pinched. Check the hoses for this.
• Powder paint may be too thin, check the return dye addition rate and add fresh paint if necessary.
• Paint may be damp, check storage conditions and store at room temperature.

Poor adhesion of powder to the material

• Check grounding.
• Voltage may be high, check.
• If there is no voltage, the dye cannot be charged, check.
• Paint may be too fine grained, check return addition rate, add fresh paint if necessary.
• Check the surface treatment, the surface may not be able to wet the surface caused by the treatment.
• Check the distance between the gun and the material.

Frame Effect

• Powder coating grains may be coarse, contact the manufacturer.
• Voltage may be too high, check.
• The distance between gun and material may be too small, check.
• The air speed carrying the paint may be high, check it.

Back Ionization

• Voltage may be high, reduce it.
• Gun may be too close to material, check.
• Powder paint grains may be very fine, check the return rate, add fresh paint if necessary.
• Fresh paint may be fine grained, contact the paint manufacturer.

Clumping in the Box

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