use:
Clean decontamination
Grit removal, cleaning, remove burrs, large and small sand cast iron, forging, heat treatment parts, non-ferrous metal castings

Surface Treatment
Surface treatment (ship, steel, welded structure) painting / plating before forging metal surface treatment, the mill etching

Sandblasting
Strengthening the mechanical parts in order to avoid cracks, fatigue, and stress corrosion (springs, gears, crankshafts, turbine, welded structure)