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Environmental requirements and spraying construction essentials for aluminum alloy boat coating
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Release time:
2022-07-12
Environmental requirements for aluminum alloy ship coating process: During all construction stages of this process, the temperature and humidity of the construction environment must be monitored. The coating environment temperature should be between 5-35℃, with relative humidity below 85%, and the substrate surface temperature should be at least 3℃ above the dew point. Temperature and humidity should be measured near the substrate. If the substrate temperature exceeds 40℃, construction is not recommended. Construction must strictly follow the product's environmental requirements. There should be no dust around the hull, and construction can be enclosed with good ventilation conditions.
Aluminum alloy boatEnvironmental requirements for coating process:
In all construction stages of this process, the temperature and humidity of the construction environment must be monitored. The coating environment temperature should be between 5-35℃, with relative humidity below 85%, and the substrate surface temperature should be more than 3℃ above the dew point. Temperature and humidity should be measured near the substrate. If the substrate temperature exceeds 40℃, construction is not recommended. Construction should strictly follow the environmental requirements of the product. There should be no dust around the hull, and construction can be enclosed with good ventilation conditions. Before each spray painting, wet the aluminum alloy boat hull with water to reduce dust. The air compressor used for spray painting should ensure sufficient air pressure and capacity. The air should be cooled and separated from water vapor before entering the spray gun and airless spray machine, ensuring that the compressed air is free of water.
The following key points should be noted for the spraying construction of aluminum alloy boats:
1. Before starting the paint construction on the aluminum alloy boat, the construction personnel should check the spray gun and adjust it.
2. Hold the spray gun properly, keeping the spray pattern always perpendicular to the surface, and maintain a uniform distance of 25 to 30 centimeters from the surface being coated to prevent the hand and brain from moving in an arc.
3. The trigger should be pulled before the nozzle is in a straight line with the edge of the surface to be coated. The trigger should be fully pressed, and the spray gun should move at a uniform speed until it reaches the other side of the object, then the trigger should be released to stop the flow. However, when the spray gun continues to move a certain distance on the aluminum alloy boat until it returns to the original path and reaches the side of the object to be sprayed, the trigger should be fully pressed again, and the spray gun should continue to move past the object.
4. When spraying, start the trigger while moving the gun, and also close the trigger while moving.
5. Each spray path should be 50% heavier than the previous one, and the paint film should be evenly covered. At the corners of the spray, the spray gun should be aimed at the centerline of the corner to ensure uniform film thickness on both sides.
6. After the epoxy primer is fully cured (generally more than 24 hours), rough grinding should be performed (either pneumatic or electric grinder can be used). Generally, 80 #-120 # sand discs or sand belts are used for grinding, and it is required that all primer surfaces are ground properly.
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