1.0 Scope 
 This process is suitable for pre-coating the surface of the iron and steel products processing, the product surface layer of water-insoluble phosphate coating color, coating film to inhibit corrosion under the coating and the substrate and to have good adhesion between. Immersion or spray process can be used in two ways, room temperature processing. Tel 13807145272 
 2.0 Process 
 Rust degreasing → washing → washing → phosphate → (washing) → drying or spray drying. 
 Phosphate: The HY-25 5-10%, 90-95% of water dubbed phosphate working solution. 5-10 minutes in which the workpiece. 
 Drying: drying, dried, or dry, to rule out excess water in the workpiece. 
 Inspection: The appearance of the phosphate coating should have a certain saturation of color, should not have rust, loose film, sticky residue and large amounts of ash hanging. 
 Clean surface: the surface after cleaning should be no rust, no dust, no sticky residue, and then painting. From the phosphate coating is completed to the time interval between no more than 48 hours.