Common problems and treatment methods

Defects

Cause

Solution

Vertical flow

1. Overdose of the diluent causes the paint viscosity to be too low and lose the viscosity.

2. The paint is too large, the spraying distance is too close, and the gun is moving too slowly.

3. Too much paint or paint, too thick or too short.

4. Pigment with high density in the paint, stirring uneven.

5. The coated surface is too smooth.

6. Too low temperature and too slow drying .

1. Proportion as required.

2. Control the paint quantity, spray distance of 20-30cm, and control the appropriate nozzle movement speed.

3. The coating thickness should not exceed 30cm at a time, and the coating interval should be mastered.

4. The paint should be thoroughly stirred in the construction.

5. The coating should be carefully polished.

6, keep the coating at room temperature 15 ~ 30 ℃.

Grain

1. The job site is not clean and the dust is mixed into the paint.

2. After the paint mixing is too long, the paint and the hardener have produced copolymers.

3. There is too little oil in the spray gun. The air pressure is too large to make the paint atomizer or the spray gun is too close to the surface.

1. Clean the spray paint room and cover the paint bucket.

2. The paint configuration should not be placed too long.

3. Paint the spray gun to make it in the best working condition, and determine the distance between the muzzle of the gun and the distance between 10 ~ 20cm.

Orange peel

1. Too little diluent, too thick paint, which makes the film flow flat.

2. Too many hardeners make the paint dry and react violently.

3. The spray pressure is too large to be flattened.

4. The temperature of the homework is too high, which can reflect the speed of the film.

5. The coating temperature is too high.

6. The spraying distance is too far or too close.

1. Adjust the proportion to the appropriate viscosity according to the instructions.

2. Match according to instructions.

3. Adjust the air pressure, not too much.

4. Pay attention to the air temperature, and add slow drying water to suppress the drying rate.

5. Reduce the temperature difference.

6. It is advisable to determine the range of muzzle distance from 10 ~ 20cm.

Blister

1. The compressed air has water mixed to the paint film.

2. High temperature on the job site and too fast paint drying.

3. High water content and high humidity.

4. Spraying too thick at a time.

5. Poor filling

6. High viscosity of paint mixing.

1. Oil and water separator, pay attention to drainage.

2. Add slow drying water.

3. The surface treatment is clean and the paint is covered with white water.

4. It should not be too thick at one time, and the amount of oil can be obtained 2 to 3 times.

5. Fully fill the base material.

6. Apply appropriate spray or brush viscosity.

Pinhole

1. The curing agent is too much, and one spray is too thick.

2. The spraying time interval is too short, resulting in too thick paint film.

3. Excessive paint viscosity.

1. In proportion, the spray shall not be too thick at a time.

2. The paint film is completely dry and polished and then applied to the next layer.

3. Apply appropriate spray or brush viscosity.

White

1. The temperature of the operation is large, the paint film reflects severe, and it may combine with moisture in the air to produce a whitening phenomenon.

2. Once spray is too thick.

3.There is water in the air.

1. Pay attention to the temperature of the site, and add anti-white water to prevent the occurrence of whitening.

2. The thickness of each coating shall be no more than 35 mm.

3. Compressed air filtration.

Cracking off

1. The overdose of the hardener makes the paint film brittle and lose its toughness.

2. The lower layer is not dry, the upper layer is too thick, causing poor density.

3. The bottom layer is not clean and greasy, and the former is not handled properly, which affects the density.

4. The hardener is added to the paint without stirring evenly, and the hardening is not good.

5. The underlying surface is not compatible, and the occlusion occurs, causing the detachment.

6. Stir the paint evenly to prevent the paint from being separated from the paint, which makes the paint film too tight.

7. The moisture content of wood is too high or too low.

1. Proportion as required.

2. Don't do it.

3. Wash and dry with thinner.

4. Stir well.

5. Pay attention to the supporting surface.

6. The paint should be mixed evenly before mixing.

7. The moisture content of wood is controlled at 8-13%.

The bottom of the bite

1. The upper and lower layers are not compatible.

2. Insufficient interval time.

1. The upper and lower layers of paint should be used.

2. Apply a coat of paint after drying the paint.

Uneven luster

1. The paint film is too thin and the thinner is added too much.

2. Rough surface and poor seal.

3. Apply the lower layer to the bottom.

1. The diluent should be added in proportion and the number of coating times should be increased.

2. The surface grinding should be smooth, and the bottom layer is closed completely.

3. After dry, apply the next layer (with non-sticky sand paper).

Shrink oil flowering

1. The surface contains oil, wax and impurities.

1. Scrub the surfaces with the thinner and polish them.

Slow drying

1. The ambient temperature is too low or the temperature is too high.

2. The hardener ratio is too little or the slow drying diluent is used.

3. The coating has water, oil wax and other adhesion.

4. High water content in the coating.

5. Coating excessively thick.

1. should be avoided in the temperature of 5 ℃ under construction or temperature above 80 ℃

2. The suitable quick-drying diluent should be selected according to the correct proportion.

3. Clean with diluent or alkaline solution.

4. The moisture content of wood is controlled at 8-13%.

5. Appropriate spraying, film thickness should not exceed 35.