Scope of application: Suitable for surface cleaning, surface pre-treatment, surface cleaning of metal workpieces in ship repair, bridge, mine, container, steel structure, machinery, petroleum pipeline, metallurgy, boiler, machine tool, railway, machinery manufacturing, port construction, water conservancy engineering and other industries Remove all surface residues such as rust, scale, oil, old paint, welding slag, and impurities on the surface of metal workpieces. At the same time, the surface of the metal workpiece has a proper roughness and matte surface, which increases the surface adhesion. In addition, it can also be used for engraving of fur, glass, stele and fields, spray processing and surface treatment of all non-metallic workpieces.