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1. The grassroots rust removal method uses equipment for polishing or sandblasting rust removal. After rust removal, there should be no rust spots on the grassroots, and oil, grease, sand, iron sand, and metal oxides should be cleaned thoroughly. After rust removal, the bottom coating must be sprayed for anti-corrosion treatment within six hours. Before the spraying process, in case of rain or other conditions that cause the surface of the substrate steel to be damp, it is necessary to wait for the environment to reach the construction conditions, and then dry the surface moisture with dry compressed air before rust removal; After rust removal, the surface of the steel should reach the rust removal grade Sa2.5, and the surface should be cleaned before proceeding to the next process. If the rust removal is qualified, the surface of the steel should present a metallic luster. If rust has returned before the bottom coating, it should be re polished or sandblasted to remove rust. The abrasive requirements should not be reduced to avoid reducing roughness. The rust removal of old colored steel tiles is an important step, and patience and attention should be paid when handling them.

2. Cleaning process: High pressure cleaning equipment is used, and the surface of the base layer must be cleaned thoroughly. The gaps, uneven areas, and hidden corners of the base layer must be thoroughly cleaned. The base surface must be firm and flat, and any uneven or cracked areas must be reinforced before construction; The base surface must be thoroughly cleaned and free from impurities such as soil, dirt, floating dust, debris, open water, oil stains, or loose materials, and attention should be paid to keeping the base surface clean at all times.

3. Process requirements for anti-corrosion primer on color steel tiles: Before construction, the base surface must be kept free of floating rust, moisture, accumulated water, and clean. Construction must not be carried out in rainy or cloudy weather conditions. High pressure spraying equipment is used for construction, and the construction materials must be free of sediment. After strict inspection, the packaging drums should be opened and used as much as possible on the same day; Before using the spraying materials, they must be evenly mixed using a grinding machine to ensure that the high-pressure spraying equipment does not experience blockage during the construction process. The spraying process must be uniform, without accumulation or omission.

4. Inspection and repainting: For corners, edge seams, horizontal and vertical overlaps, fan openings, protruding roof pipes, air conditioning pipes, metal plate and parapet wall junctions, screw fasteners (wall corners, C-shaped steel, H-steel, wire ducts, ceiling hangers, pipes) and other metal roof (wall, indoor) anti-corrosion weak links, carefully inspect to ensure that all edge seam corners are sprayed in place.

5. Requirements for anti-corrosion surface coating process: The surface coating construction can only be carried out after the bottom coating surface is dry and solid. High pressure spraying equipment is used for construction, and the anti-corrosion coating after construction should be thin and uniform, meeting the design requirements; No defects such as detachment, accumulation of cracks, warping, bubbling, layering, and loose end closure are allowed. Ensure seamless and comprehensive coverage of the grassroots during construction, and enter the maintenance period after the completion of the project. No one is allowed to enter the construction site.

The above is the content introduced to you about the construction method of color steel tile paint spraying. If you have any further questions, please feel free to consult our website, and we will have someone to explain it to you.