Sampel pictures | Problems | Probable causes | Suggested solution |
Orange peel | High temperature of the substrate | Reduce the temperature of the substrate | |
More maturing time | Strictly follow the manual description for coatings maturing process. | ||
High viscosity of the coating material | Decrease the viscosity of the coating material | ||
High air pressure | Lower air pressure |
Sagging | Low temperature of the substrate, the thickness of substrate is too thin or uneven, the surface area of the substrate is too big. | Properly increase the preheat temperature to the substrate. | |
The coating has benn applied too thickly, the volume of spray is too big, the spray gun is too close to the substrate surface, atomization is not sufficient, the speed of spray line is too slow | Properly adjust the speed of the spray line, the distance between the spray gun and the substrate suface, the ratio of coating to air in the spray. | ||
Ambient environment: low temperature, high moisture (humidity) | Equiped with the apparatus for temperature and dry control in the spray line |
Fish eyes | Cntaminats (such as the oil/grease, foreign materials etc.) on the substrate | Wash and clean the parts before spray process | |
Insufficient maturing of coatings, the maturing time is short. | Strictly follow the manual for the maturing process | ||
Water in the compressed air caused by the fault of air compressor | Repair the air compressor and check the oil/water trap | ||
High moisture (humidity) environment | Equiped with the apparatus for temperature and dry control in the spray line |
Overspray cratering | High viscosity of the coating material | Reduce maturing time or consult our technician | |
Too much overspray in the application process, during curing process, the topcoat is rapidly cured and the evaporation of interior slovant is too slow | Reduce the thickness of film | ||
Low temperature of coating material | Application after reaching the proper temperature of coating material | ||
Bubble in coating materials | Consult our technician |
Hazing low gloss | Improper pretreatment to the substrate, high roughness after grit blasting process | Redo the pretreatment to the substrate | |
The maturing time is too long or the coating is going to bad cause by the low pH value. | Reduce maturing time and consult our technician | ||
High preheating temperature to the substrate | Reduce preheating temperature to the substrate | ||
High moisture (humidity) environment | Equiped with the apparatus for temperature and dry control in the spray line | ||
Chromatic aberration | The cured film thickness (main reason) | Apply the thickness of film in proper range | |
Coating maturing with insufficient dispersing to A liquid | Completely disperse the A liquid before maturing process | ||
Spray application with insufficient dispersing to matured coating which is been long time for storage | Completley disperse the matured coating before spray application |