True stone paint is widely used in our daily lives, but over time and due to environmental factors like frequent rain, corrosion is inevitable in steel sheeting. Before applying the anti-corrosion topcoat, what treatments should be done for rust removal on the steel sheeting roof?

1. Rust Removal

Completely clean the base layer, using equipment for rust removal by grinding or sandblasting, and ensure all oil stains, dust, and metal oxides are thoroughly removed. The base layer must be free of rust spots after rust removal. After six hours, apply a corrosion-resistant primer. Rust removal should be done only when the environment meets the construction requirements, and the surface must be swept clean before proceeding to the next step. The steel surface after qualified rust removal will exhibit a metallic luster.

2. Clean-up

Utilizing high-pressure cleaning equipment, the base surface must be thoroughly cleaned and free from dust, debris, oil stains, and other impurities. The base must be solid and level. For uneven or cracked areas, reinforcement must be applied before construction, and constant attention must be given to maintaining the cleanliness and hygiene of the base surface.

3. Corrosion Inhibitive Primer

Prior to construction, ensure the base is clean and free of stains; do not proceed in rainy or cloudy weather. Use high-pressure spraying equipment for application, and the construction materials must be free of sediment. They must undergo rigorous inspection, and once the packaging drums are opened, they should be used up as soon as possible on the same day. Before use, mix the spraying materials evenly with a grinder, ensuring there are no blockages during the application process. The spraying must be even, with no accumulation or missed spots.

4. Inspect touch-ups

Corner joints, seam overlaps, pipe connections, screw fasteners, and other vulnerable areas of metal roofing for corrosion prevention require thorough inspection to ensure complete coating in all seam corners.

5. Corrosion-Resistant Surface Coating

Coating application must be performed after the primer has dried and cured. Construction should be carried out using high-pressure spray equipment, ensuring the protective coating is evenly applied and free of defects such as peeling, bubbling, or delamination. The base surface must be fully covered without any gaps, and the finished product must be cured after construction. Entry to the construction site is strictly prohibited.