The coating of machining is to cover the metal and non-metal surfaces of machined parts with protective or decorative layers. What are the requirements for painting of machined workpieces?
What are the requirements of machining for painting
1. Before painting, rust, oxide skin, grease, dust, soil, salt and dirt must be removed from the surface of machined workpiece requiring painting.
2. Before rust removal, remove grease and dirt on the surface of the workpiece with organic solvents, lye, emulsifier, steam, etc.
3. The time interval between the surface to be painted after shot blasting or manual derusting and the primer shall not be more than 6h.
4. The surface of riveted parts in contact with each other must be coated with a thickness of 30 ~ 40 before connection μ M antirust paint. Lap edges shall be closed with paint, putty or adhesive.
5. The primer damaged due to machining or welding shall be repainted.
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