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Fire protection coating is a very common fire-fighting materials, in a variety of buildings have applications, then we know the construction procedures of fire-resistant coatings? Let's take a look.
, construction procedures
first need to complete the basic cleaning of steel components, and then with galvanized steel nails fixed.
is secured with fire-resistant special glue, stainless steel nail length 18mm) and then the first spray coating
.
: the first coating is very important, thickness control within 300um, with small gun head high-pressure sprayer spray. Can effectively enhance adhesion, curing time is not less than 12h, temperature 10, air humidity 15%.
The second layer of coating spraying (powder, glue, water should be in accordance with the site and manufacturer ratio requirements reasonable ratio, replacement of large-scale spraying machinery, repeated spraying, the general thickness control in about 10 mm, to ensure that no hanging, no leakage, uniform coating surface, color consistent).
(the mesh is divided into two types: galvanized or anticorrosive hexagonal steel mesh, alkali-free soft glass fiber mesh cloth.) The purpose of hanging the mesh is to prevent the coating from falling off because the coating is too thick, cracking or even falling off, thereby reducing fire resistance)
spray surface coating (using high-pressure airless and high-pressure pneumatic sprayer, note: surface coating selection (low corrosion area) recommends the choice of water-resistant clean thin coating, strong water resistance and weather resistance, high glue density. Can play a good sealing role, flame retardant powder content is high, can better insulation and flame retardant, effectively reduce the heating of steel structure. Do not use oily ultra-thin fireproof coatings (except in highly corrosive areas). If oil and water do not combine, the oily coating surface is prone to peeling, cracking and falling off due to improper osmosis treatment.
, quality analysis, control and the importance of safe and civilized production
. 1. Before spraying, the corrosion protection of steel components must be checked, especially the anti-corrosion treatment of welding joints. Anticorrosive materials for steel components are recommended for epoxy-rich and zinc-rich paints, not acetic paints. Alicic paint adhesion is not enough, non-expansion type fire-resistant paint after drying contraction. Due to the shrinkage of fire-resistant coatings, alicic acid coatings fall off, resulting in the overall cracking of the coating, empty drums, and even off.
2. Surface treatment of steel components, with compressed air or blowing wind to sweep the surface of floating dust. Chemically treat the oil so that the surface is free of floating dust and dirt.
3. Steel nails should be reasonably selected, can only use galvanized or alkali-free glass fiber square cloth products. Steel nails that are not anti-corrosion are prone to corrosion and rust for a long time to prevent paint from falling off due to corrosion of steel nails.
4. The thinner the coating, the better. The concentration of glue must be large. The proportion of powder, glue and water should be reasonably controlled. Otherwise, the entire coating will crack off due to poor grass adhesion.
above is the knowledge about the construction of fireproof coatings, I hope these content can help you better understand fire-resistant coatings.
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