Passivation (remove iron at surface to prevent corrosion, use nitric acid, ASTM A380)

Pickling (acid treatment to remove metal scale produced in welding or hot working)Degreasing, Sand Blasting, Wire Brushing,Barrel Finishing and Vibratory Finishing

Mechanical Grinding and Polishing	Electropolishing             (brightens the steel surface by selective   dissolution of the high points)

Machined Parts  Polish	Bend Pipe Plish	Pipe Polish (before/after)
Casting Part Polish	Complex Part Polish	Stainless Sheet Polish