HG/T 5-1616-1986 "Export Rubber Machinery, General Technical Conditions for Painting" is a chemical industry standard, which formulates technical requirements for the painting process of export rubber machinery. The content covers painting pretreatment (substrate derusting, degreasing and surface roughness control), Coating performance indicators (adhesion, corrosion resistance, weathering resistance, chemical resistance, etc.), coating process (primer, topcoat supporting system, coating times and drying conditions), Appearance mass requirements (coating flatness, uniform color, no sag, voids, etc.) and inspection rules. This standard applies to the surface protection painting of export rubber machinery, and ensures that the coating meets the requirements of corrosion resistance, wear resistance and Appearance conformity in international trade through standardized processes, enhances the international competitiveness of products, and provides technical basis for the production, mass inspection and trade acceptance of export rubber machinery.