The types, causes and treatment methods of defects that are easy to occur during air spraying have many similarities with brush coating. The causes and treatment methods of defects related to air spraying technology are as follows:
| Types of defects | Cause | Processing method |
| Sagging | Uneven spraying pressure | Control spray pressure |
| The spraying distance is too close | The distance is controlled at 15 ~ 25cm | |
| The spraying speed is unbalanced with the paint output | Adjust the spray speed to maintain balance with paint output | |
| Excessive spraying | Control the amount of spray | |
| The spray angle is not right | Keep spraying vertically | |
| The spraying ambient temperature is too low | Increase the ambient temperature | |
| The nozzle is large, the pressure is large, and the paint output is large | Select the right nozzle and pressure to control paint output | |
| bubble | The sprayer's filtration system fails | Inspection and repair of filtration systems |
| One spray is too thick | Control the amount of spray | |
| The Spray Gun pressure is too high, and the spraying distance is too far | Control spray pressure and distance | |
| The solvent evaporates too quickly | Add an appropriate amount of a slowly volatile solvent | |
| Whitening | Moisture is mixed in the paint | Check the oil/water separator |
| The humidity in the spray booth (cabinet) is too high | Control the relative humidity in the spray booth (cabinet). | |
| The wind speed in the spray booth (cabinet) is too large | The wind speed is controlled at 50 ~ 80cm/s | |
| Low boiling solvents are added too much | Control the amount of low boiling solvents added | |
| Orange peel | The spraying pressure is insufficient, and the paint is not atomized well | Increase spray pressure |
| The spraying distance is too far | Control the spray distance | |
| The viscosity of the paint is too high, and the spray liquid is not atomized well | Adjust paint viscosity | |
| The coating temperature is too low and the leveling is poor | Increase spray temperature and improve leveling | |
| The Spray Gun moves too fast or too slowly | Correctly grasp the Spray Gun movement speed | |
| The nozzle is worn and the paint liquid is not atomized well | Replace the nozzle | |
| Improper selection of gun models | Choose the right Spray Gun according to the coating properties | |
| grain | The Spray Gun moves too fast and sprays unevenly | Control the movement speed of the Spray Gun, preferably at 30 ~ 50cm/s |
| The spraying pressure is too low, and the paint is not atomized well | Adjust the spray pressure | |
| The nozzle aperture is small, the pressure is too large, the spraying distance is too far, and the paint solution has not reached the surface and has been gelled | Spray correctly according to operating procedures | |
| The spray amount is too small, and no continuous coating film is formed | Increase the amount of spray | |
| The sprayer filter system fails | Inspection and repair of filtration systems | |
| The surface of the substrate is dust, abrasive debris and wood wool and other dirt | Before spraying, the surface of the substrate is effectively cleaned, dusted, wood hair removed, and the air is purified | |
| The used Spray Gun is not washed and the paint particles are sprayed out | Clean the spraying equipment in a timely and effective manner after spraying |
