中文(wén)版
Defect name | The phenomenon of | why | Solution to the reference |
Shrinkage | There is a circular pit or small white point phenomenon | The substrate has oil | The substrate is clean |
Add inappropriate diluent | Replace the diluent | ||
Low temperature, paint is not easy to leveling | Preheating of substrate 35-50 ℃ before construction | ||
Trachea or gun with water, oil and so on | Go to the water and go to the oil | ||
Thickening | Coating viscosity increased | When stored, the diluent evaporates | Pay attention to sealing to prevent solvent evaporation |
Storage temperature is high | Store in air conditioning room at 25 ℃ | ||
Storage time is too long | First out first, run out during shelf life | ||
precipitation | Barrel bottom sedimentation phenomenon | The solid content sinks during storage | Mix frequently or roll paint |
| Coarse particles | The surface of the coating has the phenomenon of particles | There are impurities in the paint | Choose the appropriate filter |
Substrate is not smooth, burr | Substrate processing is flat | ||
Spraying the environment with dust particles | Clean the baking environment | ||
Moisture absorption | After spraying the surface of the wet film surface water droplets; surface watermark, flower phenomenon | Paint easy to absorb | Choose dry weather or environmental spray |
Preheating of substrate 35-50 ℃ before construction | |||
After coating, enter the oven as soon as possible | |||
| Exposed at the end | Reveal the color of the substrate | Spray too thin | Spray to the appropriate film thickness |
The amount of paint dilution during construction is too large | Adjust to the appropriate viscosity | ||
Poor paint hood | Choose a good coating for hiding | ||
Blistering | After sintering the surface of the coating bubble point | Substrate treatment is not clean, there are grease | Degreasing |
The temperature is too fast and the solvent evaporates instantaneously | Re-set the baking process | ||
Spray too thick | Control the spray thickness | ||
Paint construction viscosity is too high | Re-adjust the spray viscosity | ||
| Shedding, poor adhesion | Coating adhesion is poor, from the substrate of the phenomenon | Substrate treatment is not clean, there is oil | Sintering temperature and time are not correct |
Sintering temperature and time are not correct | Check furnace temperature and sintering time | ||
| Orange peel | The paint film showed an orange-like appearance of the surface sickness | Construction viscosity is too high | Adjust the spray viscosity |
Spray atomization, pressure is not appropriate | Adjust air pressure and atomization | ||
Sagging | As the wet paint film moves down to form a variety of shapes the lower edge of the thickness of the uneven coating | Paint construction viscosity is too low | Adjust the spray viscosity, the amount of oil and pressure |
| Spray too thick | Adjust the spray thickness | ||
Low temperature or smooth substrate | Preheating of substrate 35-50 ℃ before construction | ||
| Poor appearance | The film lost light or yellow, dark phenomenon | Oven or tunnel furnace exhaust is not good | Improve exhaust |
Sintering temperature or time is not correct | Check furnace temperature and sintering time | ||
Spray thickness is too thick or too thin | Adjust the spray thickness |