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Precautions for Spraying Aluminum Alloy Boats
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Release time:
2022-06-29
The aluminum alloy boat uses methods such as surface painting for protection or installing anti-corrosion zinc blocks to avoid the attachment of shellfish, algae, and other objects that could reduce the boat's speed or accelerate the aging of the aluminum alloy.
Aluminum alloy boatTo avoid the attachment of shellfish, algae, and other objects on the hull that may reduce the boat's speed or accelerate the aging of aluminum alloy, methods such as surface painting protection or installing anti-corrosion zinc blocks are used.
Aluminum alloy boat coating climate conditions
The main factors to pay attention to when coating aluminum alloy boats are the condition of the aluminum alloy surface and the atmospheric environment during coating. Generally, the coating work should be carried out at temperatures between 5°C and 32°C, and relative humidity below 85%. Coating work should not be performed when the surface is affected by rain, fog, or snow. For special coating varieties, the coating work should be carried out according to the supplier's requirements or guidelines.
The following points should be noted during the spraying construction of aluminum alloy boats:
1. Before starting the coating, the constructor should check the spray gun and adjust it to produce an ideal fan shape;
2. Hold the spray gun so that the spray beam is always perpendicular to the surface and maintain a uniform distance of 25 to 30 centimeters from the surface being coated, avoiding hand and brain movements that result in arc-shaped movements;
3. The trigger should be pulled just in line with the edge of the surface to be coated and the nozzle. The trigger should be fully pulled down and the spray gun should be moved at a constant speed until reaching the other side of the object, then release the trigger, turn off the fluid, but continue to move the spray gun a distance until returning to the starting point, and when reaching the edge of the sprayed object, pull the trigger down completely again and continue moving past the object;
4. The trigger should be activated while moving the gun, and similarly, it should be closed while moving: e) each spray path should overlap the previous one by 50%, ensuring an even coverage of the paint film: at corners, the spray gun should be aimed at the centerline of the corner to ensure uniform film thickness on both sides. After the epoxy primer has fully cured (generally more than 24 hours), rough grinding should be carried out (using pneumatic or electric grinders), generally using 80#--120# sand discs or sand belts for grinding, ensuring that all primer surfaces are properly ground.
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