Electrostatic Paint Control
When painting with electrostatic powder paint, the quality of the paint or paint must be controlled absolutely. Some problems in electrostatic powder coating and the recommended solution are given below.

Figure 1: Crater

* Inadequate pre-treatment and oil and chemical residues in the parts to be painted have not been cleaned well. If this is the solution, the pre-transactions are checked again and the supplier company receives the information.
* Silicone oil has become a source of contamination. Silicone-free cleaning materials should be used.
* Painted parts are moist. Drying time or temperature should be increased.
* There has been contamination with a different powder paint. When changing color and type, the equipment must be cleaned and the air inside the oven should be checked.
* Back ionization effect occurred. Grounding should be checked.

Figure 2: Needle holes

* The moisture content of the powder coating is high. The storage temperature must be checked and stored on the conditions specified on the product label.
* There was contamination with another powder paint that did not match. The equipment must be thoroughly cleaned when changing color and gender.
* The gas inside the paint is out. The film thickness should be reduced.

Figure 3: Weak covering

Grounding is insufficient. The grounding contact must be checked from the conveyor rail to the part. All contact surfaces must be free of powder paint, oil and other insulating materials.
* Powder coating is too high. The powder paint supply must be throttled until sufficient loading is achieved. The air in the cabinet is moist. Moist air humidity tends to distribute the load on the powder paint particles. The area of ​​the spraying area should be controlled.
* Powder paint is very incised. At the same time, the grain distribution of the powder should be checked and contacted with the manufacturer.
* Powder paint type / formulation may have been installed incorrectly. Some powder coating formulations are better loaded than others. Some other dyes have been developed for thin film applications. The manufacturer should be contacted.
* The air pressure is too high and the powder is coming off the paint piece. The air pressure should be lowered or the pistol removed from the part.

Figure 4: Indentation coloring

* Powder coating is very low. The powder paint supply setting should be raised.
* Insufficient grounding is done. The grounding contact must be checked from the conveyor rail to the part. All contact surfaces must be free of powder paint, oil and other insulating materials.
* Voltage is too high. By lowering the tension setting, powder coating of the corners closer to the gun should be prevented.
* Air pressure is very high. Avoid sweeping the paint in the recesses by reducing the air pressure.
* Incorrect spray jet: The jet jet must be adjusted and alternate nozzles should be tried.
* Incorrect jet direction and angle. The spray direction must be set so that the beam reaches directly over the indentations.

Figure 5: Framework effect

* High voltage applied. The voltage should be adapted to the part you are working on.
* The gun is not used in the proper position. The distance of the gun to the material should be optimized.
* The film thickness is not homogeneous. The gun position and feed must be adjusted accordingly.
* Cracked or damp paint may have been used. The air pressure should be raised, hand mixed and the pressure of the compressed air checked again.

Figure 6: Orange image

* The film thickness is more or less. Operating conditions should be checked.
* The oven warmed up a long time. The oven temperature should be raised.
* High voltage applied. The voltage should be adapted to the part you are working on.
Back ionization has come to fruition. Grounding must be controlled and the distance of the gun to the material must be increased.
* There was contamination with another powder paint that did not match. Equipment must be cleaned when changing color and gender.

Figure 7: Color difference

* Film thickness varied. The film thickness should be tried to be equalized for each point.
* Paint firing conditions varied. The furnace operation must be optimized.
* Powder paint mixed with a different powder paint. Equipment must be adequately cleaned when changing color and paint color.
* Oil, water, surface treatment and chemical residues remained before painting.
* Parts must be checked and cleaned prior to painting.

Figure 8: Mist

* Powder paint mixed with a different powder paint. Equipment must be adequately cleaned when changing color and paint color.
* Oil, water, surface treatment and chemical residues remained before painting. Parts must be checked and cleaned before painting the surface.
* Vomiting additive materials. The oven temperature and duration should be checked and the temperature or time should be increased.

Figure 9: Low mechanical strength

* Curing of paint is not enough. The oven temperature and duration should be checked.
* Inadequate pre-treatment and oil and chemical residues in the parts to be painted have not been cleaned well. If this is the solution, the pre-transactions are checked again and the supplier company receives the information.
* The film thickness is more or less. The film thickness must be adjusted by adjusting the gun.

Figure 10: Corrosion

* Inadequate pretreatment has been applied and oil, chemical residues can not be cleaned well in the parts to be painted. If this is the solution, the pre-transactions are checked again and the supplier company receives the information.
* Curing of paint is not enough. The oven temperature and duration should be checked and the temperature or time should be increased.
* Proper powder paint has not been selected. The manufacturer should be consulted.

Figure 11: Track surface

* Dust and dust have been spilled into the cabin from the conveyor or hangers. The conveyor should be cleaned at regular intervals. Conveyor bearings should be lubricated with the correct oil and adequately lubricated, and bearings should not be allowed. The hangers should be cleaned in time.
* Parts entering the cabinet are dirty. The degreasing and surface treatment processes should be controlled. It should be checked that the piece has dried sufficiently before entering the cabinet.
* The air of the facility environment entering the cabinet is dirty. The powder coating application environment should be separated from the rest of the plant by the blades. If dust is present, dust must be collected and placed in a controlled room. Positive pressure should be applied to the application room. By examining other processes in the vicinity, you should be sure that they do not cause any contamination.
* Compressed air is dirty. The air compressor and air supply system should be checked.
* Screen may be torn or damaged. The sieve must be changed and checked to see if it is sitting comfortably in place.
* The sieve is not working. Sieve or sieve control circuits must be repaired or replaced.

Insufficient adhesion
* Cleaning and preparation is inadequate. Ten preparation facilities and the chemical substances used must be checked.
* Painted floor has changed. The supplier should be consulted.
* Insufficient baking has been done. The oven temperature and duration of baking should be increased.

Less pen stiffness and less resistance to abrasion
* Insufficient baking has been done. The firing time should be increased.

Insufficient brightness
* An incompatible powder paint may be mixed. All application equipment should be cleaned before putting new dust.
* Needle holes formed due to gas outlet formed. Make sure that the substrate to be painted is not porous. The floor must be checked for dampness. Make sure that the paint is not dampened during the recovery process. Check for moisture in the compressed air. The film thickness may be too much; should be checked.

STM Coatech, SSPC PCI (International Coating Enspektörlüg), and Corroder (MPA Group England), Turkey, Romania, Ukraine, Georgia, Russia, Azerbaijan, Turkmenistan, Kazakhstan, Iraq, Qatar, Kuwait, Oman, the Sudan and Algeria official licensors.

It is also authorized examination center of the country we have already mentioned above, especially Turkey. Corrodere Training Courses are listed below.

1.Icorr Level 1
2.Icorr Level 2
3.Icorr Level 3
4.IMO PSPC
5.Corrodere Hot Galvanizing
6.Corrodere Insulation Inspector
7.Practical Workshop Icorr 1,2,3
8.Corrodere Marine & Offshore Inspector
9.Transition to Icorr

Reference:
Milli Eğitim Bakanlığı MEGEP, Elektrostatik Toz Boyama, Date of Access: 9 April 2018, http://megep.meb.gov.tr/mte_program_modul/moduller_pdf/Elektrostatik%20Toz%20Boyama.pdf