Coating spraying of space frame structure
Nowadays, there are more and more forms of architecture, and the space frame structure not only has the characteristics of light weight and stability, but also has the advantages of convenient construction, so it is more and more widely used in the field of large-span construction. Compared with traditional buildings, because space frame is made of metal, it has the disadvantage being vulnerable to corrosion. At this time, it is necessary to spray some coating to prevent it from being corrosion.
Compared with the reinforced concrete building structure, the space frame structure building has some shortcomings, mainly as follows: it is easily affected by the environment, especially in the steel structure workshops of some large chemical enterprises that are prone to electrochemical corrosion , the service life is shortened; in addition, the fire prevention ability is reduced, and the structural strength is reduced in the event of a fire, which is easy to cause the collapse of the structure. Therefore, the anti-corrosion and fire-proof design and construction of the space frame is particularly important. The anti-corrosion and fire-proof spraying sequence of steel structure buildings is: rust removal, anti-corrosion primer, anti-corrosion intermediate paint, and fire-resistant top coat. When there is a fire retardant coating, theoretically, it is not necessary to apply the anti-rust intermediate paint and top coat, but only apply the anti-rust primer and then apply the fire-resistant paint.
The anti-corrosion and fire-proof spraying sequence of steel structure buildings is: rust removal, anti-corrosion primer, anti-corrosion intermediate paint, and fire-resistant top coat. When there is a fire retardant coating, theoretically, it is not necessary to apply the anti-rust intermediate paint and top coat, but only apply the anti-rust primer and then apply the fire-resistant paint. Considering that the surface of the fire retardant paint is not smooth enough, if there are certain decorative requirements, the fire retardant paint can be applied between the middle paint and the top paint or between the primer and the middle paint. There should be no chemical reaction between the fire retardant coating and each layer of anti-rust coating. Therefore, attention should be paid to the combination of anti-corrosion coatings and fire-retardant coatings when they are used together.