Surface Cleaning, Chemical Cleaning, Degreasing
This Stage allows Pickling and passivation chemicals to come in contact with metal surface which has to passivate.

Pickling process
This stage allows to itch metal surface uniformly, which is controlled itching. In this stage metal surface get activated uniformly. Should remove all sorts of contaminants including free ferrite and all sorts of scales

Passivation Process
This stage eliminates corrosion susceptibility of surface of the metals creating uniform passive layer Chemical surface conversion takes place. Surface become passive for further air - oxidation

Confirmation of Passivation ( Passivation tests )
At this stage the passivation effectiveness must be confirmed by one or more specified test practices to qualify for certification. In case of S.S. with standard qualified tests ASTM A967-01e1 10-Oct-2001, Third party specification tests or DIN / IS / BS