This standard specifies the technical requirements, inspection methods, testing and acceptance rules for protective painting of steel structures, as well as the safety, hygiene and environmental protection requirements for typical coating systems and painting operations. Protective painting for steel structures and their accessories aims to improve the corrosion resistance performance and service life of steel structures. The standard refers to a number of painting mass detection methods, such as Impact resistance, moisture and heat resistance, salt fog resistance, Coating thickness determination, etc., comprehensively standardizes the technical standards for protective painting of steel structures, and provides technical guidance for related projects and products.