With the development of steel structure workshop in the construction industry. The application of coating in steel structure engineering is favored, and various light steel beams and grid structures can also use this type of fireproof coating for fire protection. First, it can protect the steel structure from the corrosion of external substances, and second, it can extend the service life.

In order to avoid rusting during stacking, transportation and equipment, and lay a foundation for further coating, components need to be pretreated and painted with primer after welding. The derusting quality grade of component surface treatment shall be above sa2.0 ~ Sa2.5. According to the different environmental media in which the components are located, the Beijing warehouse lease selects the antirust primer. The primer of light steel structure is mainly alkyd or epoxy zinc rich.

Finish paint or fireproof coating shall be applied on the equipment site as required. The steel structure is mainly H-shaped solid web beam column structure, with simple surface treatment and painting skills, which is easy to realize mechanized flow operation. The surface treatment adopts shot blasting technique, raceway or suspension conveying method. Painting is generally manual or semi mechanized assembly line operation. The surface treatment before painting has a direct impact on the thickness and uniformity of components.