1、 Reasons for yellowing of high temperature resistant paint: 1. Environmental factors: high air humidity; 2. Excessive temperature and overreaction; 3. Direct ultraviolet light; High temperature resistant paint has low yellowing resistance.

2、 Reasons for sagging of high temperature resistant paint: 1. The surface of the coating is flat and neat; 2. The operation is wrong, and the nozzle of the spray gun is too large; 3. If the coating is too thick, brush it for many times; 4. The paint is too thin.

3、 Reasons for cracking of high temperature resistant paint: 1. The coating is too thick; 2. Paint expired; 3. The solid content of the topcoat is low, the resin itself has problems and the external environment; 4. The content of accelerator is too high; 5. The coating is too thick, the hardness of the coating itself is high and brittle.

4、 Reasons for whitening of high temperature resistant paint: 1. Insufficient solvent resolution; 2. High moisture concentration; 3. The moisture content of the substrate itself is too high.

5、 Reasons for undercut of high temperature resistant paint 1. Two kinds of mismatched primer and finish; 2. The coating of primer is too thick; 3. Paint before the bottom is completely dry

6、 High temperature resistant paint has sandpaper grain. Reasons: 1. It is not polished along the direction of wood grain; 2. The sandpaper size is too large. Polish it before it is dry.

7、 Reasons for oil leakage of high temperature resistant paint: 1. Oil residue and wax are coated; 2. Water or oil residue in high temperature resistant paint; 3. Paint viscosity is too high or too low.

8、 Reasons for foaming of high temperature resistant paint: 1. Diluent and curing agent are not matched; 2. The coating has moisture; 3. High air humidity; 4. Uneven mixing, 5. Uneven surface; 6. The paint has moisture and oil stain.

9、 Reasons for granulation of high temperature resistant paint: 1. High temperature resistant paint has impurities and has not been filtered; 2. Too much dust or impurities; 3. Uneven mixing and insufficient mixing; 4. The diluent is not matched and does not dissolve the primary agent; 5. Spraying is not standard.

10、 Reasons for surface roughness of high temperature resistant paint: 1. The fineness of the coating itself is not enough, and there are stolen goods on the surface of the coating; 2. The construction environment is too dirty and not clean enough; 3. Insufficient coating.

11、 Reasons for peeling of high temperature resistant paint: 1. No oil sealing treatment; 2. The primer is not dry and the finish coat is not applied; 3. The moisture content of the coated surface is too high; 4. Two incompatible primers and finishes.

12、 Reasons for wrinkling of high temperature resistant paint: 1. Too much curing agent is added and the drying speed is too fast; 2. The drying speed of primer and finish coat is inconsistent; 3. The nozzle is not adjusted well; 4. The coating is too thick and the viscosity is too high.

13、 Reasons for exposed bottom of high temperature resistant paint: 1. The coating is too thin, the spraying is uneven, and the bottom is deep and the surface is shallow; 2. Low cover and excessive sanding.

14、 Reasons for orange peel of high temperature resistant paint: 1. Poor leveling; 2. Too much diluent or not matched; 3. Uneven substrate or poor treatment; 4. Low temperature.

15、 Reasons for sticking sandpaper on high temperature resistant paint coating: 1. Poor solubility of solvent and high air humidity; 2. The coating is not dry, the coating is too thick and there are few accelerators.

16、 Causes of pinhole lesions in high temperature resistant paint coating: 1. Oil and water pollution; 2. Stir evenly, and there is air inside the high temperature resistant paint; 3. The surface of the coated object is uneven; 4. Spraying is too thick and the solvent is not easy to volatilize. Precautions for construction of high temperature resistant paint 1 Base processing SA2 Level 5 treatment: before the construction of high temperature resistant paint, the workpiece surface shall be treated by sand blasting and shot blasting to SA2 Level 5. Specific operation: clean the dust, oil, welding slag, rust and old paint film on the object surface, and conduct sand blasting and shot blasting to meet the construction requirements. The locally repaired surface shall be polished to grade ST3. It is forbidden to bring water into the high-temperature paint construction. 2. Scrub the workpiece surface with diluent for specific operation; (1) Adjust the viscosity of the coating with a special supporting diluent. The diluent adopts a special diluent. The dosage is about 5 (based on the weight of the coating) for airless spraying; Air spraying is about 15-20 (based on coating weight); Brush about 10-15 (based on coating weight); (2) Construction method: airless spraying, air spraying or brushing. Note: during construction, the substrate temperature must be 3 ℃ higher than the dew point, but not higher than 60 ℃; (3) Coating curing: after coating, put into use after natural curing at room temperature or dry at room temperature for 0.5-1.0 hours, then bake in 180-200 ℃ oven for 0.5 hours, take it out and cool it for 3 Construction method of high temperature resistant paint: high pressure airless spraying and airless spraying of high temperature resistant paint; Maximum dilution orifice ejection pressure 3. Film thickness 4. Minimum and longest substrate temperature at coating interval.