1. Surface treatment of local rusted parts, using spraying method to completely remove the oxidized rust layer of the rusted part and the old coating to expose the metal base material to reach S2.5 level. The edge of the processed part is polished with a power grinding wheel to form a gradient transition layer for After the paint application, there is a smooth and smooth surface.
(Compared with traditional manual polishing, the spraying method can completely remove the deep rust and old coating of the oxidized or even pit-corroded steel plate, and can form a good anchor chain-shaped rough pattern, which is beneficial to the formation of the primer Good binding power)
2. After spraying, the primer should be hand-brushed (rolled) according to the original matching plan to reach the specified film thickness.
(Hand brushing and roller coating can control the part control during primer construction, without polluting the original coating on the edge, and can also effectively control the consumption of primer)
3. The intermediate paint construction can be brushed or sprayed to achieve the original matching paint film thickness. The edge area needs to be protected and shielded by spraying. The shape of the shielding should be “mouth” to form a regular appearance effect (medium coating). (The edge protection of lacquer construction can effectively control the consumption and ensure the appearance effect)
4. Top paint construction: If a partial repair plan is adopted, after the intermediate paint construction reaches the thickness standard and meets the requirements of point 3, the top paint can be directly sprayed or brushed to achieve the original design thickness requirements. If the plan of all construction of the top paint is adopted, the entire outer surface of the tower should be thoroughly cleaned after the intermediate paint construction reaches the thickness standard. The cleaning method uses 80-100 mesh emery cloth to grind the coated surface to remove the powdered layer, ash, and dirt on the surface of the old coating. Use chemical cleaning to remove the oil on the surface of the old coating, so that the coated surface is thoroughly cleaned. Carry out the spraying of the top coat.
Post time: Nov-11-2021
