Paint is one of the most common building materials in our lives. Not only in home decoration, but also in the exterior of many public buildings, especially steel-structured buildings, how to prevent corrosion? Speaking of which, we have to say that the steel structure anti-corrosion coating , let's take a look at whether it is good or not?
Origin of steel structure anticorrosive coating products
Steel structures are increasingly used in building structures. Many large convention centers, stadiums, airport terminals, and television towers all use steel structures as their main structural form. To ensure the integrity of the steel structure and show the artistic appeal of the steel structure, it is an economically feasible method to apply heavy anti-corrosion paint for paint protection, which can reach a service life of more than 15 years. If the dual protection of metal thermal spraying and heavy anti-corrosion coating is adopted, the service life of more than 25a can be achieved.
Steel structure anticorrosive coating products
Solvent-based zinc-rich primer: (inorganic or epoxy) has good workability, and the surface treatment requirements of the substrate are slightly lower: usually inorganic zinc-rich primer requires cleanliness Sa Sa 2.5, roughness Rz40-80 microns; ring Oxygen-rich zinc primer requires cleanliness Sa Sa level 2.5, parts that can only be handled manually (St level 3) can also be used, and roughness requires Rz30-60 microns.
Water-based zinc-rich primer: A member of the water-based paint family, representing the development direction of zinc-rich primer. However, the current domestic water-based zinc-rich primers are not suitable for low-temperature construction (<5 ℃), and secondly, the surface treatment requirements are very strict (usually also required to meet Sa 3 cleanliness requirements), and the workability is insufficient good.
Aliphatic acrylic polyurethane topcoat: has excellent weather resistance and mechanical properties, and has many market application examples. So far, the most effective and classic matching recognized by the corrosion protection industry is still zinc-rich primer, epoxy intermediate paint and polyurethane topcoat.
Construction matters of anticorrosive paint for steel structure
1. Before construction, the surface of the steel structure should be derusted, and anti-rust treatment should be determined according to the requirements of use.
2. The debris on the surface of the steel structure should be cleaned, and the gaps at the joints should be filled with anticorrosive paint or other anticorrosive materials before construction.
3. During construction, parts and other objects that do not require anti-corrosion protection should be shielded and protected. The newly applied coating should be protected from dirty liquid pollution and mechanical impact.
4. Construction anti-corrosion coatings should be carried out before indoor decoration and under conditions that will not be damaged by subsequent projects.
5. During the construction process and before the coating is dried and cured, the temperature should be maintained at 5 ~ 38 ℃, the relative humidity should not be greater than 90%, the air should be circulated. When the wind speed is greater than 5m / s, or when there is condensation on the surface of the rainy day, it is not suitable for operation.
The above is the general introduction of the steel structure anti-corrosion coating . I hope it will help you. More decoration information is available on this website, so stay tuned.
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