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The reason why the oil tanker film shows orange peel
    The paint film of the oil tanker showed an orange peel-like phenomenon: After the sprayed paint film was dried, it showed irregularities, resembling citrus and grapefruit skin. The reasons for this are: 1) The construction viscosity is too high, and the leveling of the paint film is poor; 2) The thinner is not selected but the inferior diluent is used, the volatilization rate is too fast; 3) The spraying method is not proper, and the spraying distance is too long. The pressure of the compressed air is too large, or the nozzle of the spray gun is improperly adjusted; 4) The leveling time is insufficient after spraying, and the temperature rises too early; 5) In the summer construction, the temperature of the coating environment is too high at 35 degrees or more. The prevention methods are: 1) Use slow-drying or ultra-dry-drying thinner in high temperature environment; 2) Adjust the construction viscosity and improve the leveling of the paint film; 3) Use the correct spraying method; 4) Pre-baking paint film Should have a flash-over time of 10 minutes or more; 5) Improve the painting environment and try to spray within the recommended temperature range. Remedy: After the paint film has dried up, the orange peel is polished and polished. In severe cases, re-spray.
The phenomenon of tweezers from the painter's coating film: small, sharp blister and blister marks on the surface of the paint film. After grinding these small cannons, they will leave tiny holes. These vesicles are like tweezers and are the air in the microbubbles. All trapped in the coating produced a defect. The reasons for this are: 1) The construction is irrational, the surface of the paint dries too fast, the coating is too thick, bubbles in the paint or construction are trapped in the coating film and become tweezers; 2) spray gun nozzle (caliber), spray viscosity or Insufficient spraying pressure; 3) Insufficient static time before heating or drying. The methods of prevention are: 1) use the correct spray viscosity, spray pressure, nozzle caliber; 2) use appropriate hardeners and thinners; 3) give enough rest time to regularly check barn pressure and temperature inside the barn.
Scarring occurs at the scraper's part where the scraper is used for refinishing painting. The surrounding topcoat bulges into a loop. The reasons for this are: 1) The substrate is not completely hardened, so that the finish is absorbed; 2) The putty part is scraped Insufficient polishing; 3) Putting no primer on the putty part, the putty layer has a large amount of paint, or its color is different from that of the primer layer; 4) The putty used has large shrinkage and will continue to deform after curing. The prevention methods are as follows: 1) After the substrate is completely hardened, then spray the top coat; 2) The scraping part should be fully polished, the edges should be smooth; 3) Put a primer on the putty part or coat with a top coat to seal Solid edge; 4) Use of a small shrinkage putty. After the repair material dries out, the damaged part is flattened, separated by the primer material, and then sprayed again.
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