Passivation is the treatment of a metal with a mild oxidant that removes iron, oils, and other contaminants,This allows the metals herbal passive layer to be extended and forestall corrosion. Stainless steels and nickel alloys passivate automatically, but whilst they are being fashioned and handled, foreign contaminants can invade the passive layer. Passivation restores the passive layer to prevent corrosion. huashang can provide passivation with nitric acid and citric acid baths and can meet all major enterprise standards. 
