Stainless steels passivation

Passivation is the use of an oxide film on metals and alloys to slow corrosion. Naturally, stainless steel has a thin passive layer that appears when the material is in contact with the surrounding oxygen. Passivation is a chemical treatment that recreates the surface layer of chromium oxide on stainless steels after this protective layer has been impaired during scouring and formatting operations. By providing a thicker and more uniform layer, chemical passivation is carried out to protect stainless steel installations and supports, guaranteeing perfect resistance to corrosion.

Stainless steel treatment by immersion or spraying

Depending on the configuration of the pieces to be treated, passivation is performed either by immersion in treatment baths or by spraying. At industrial sites, passivation is performed by by circulation inside networks, by sprinkling, spraying, or runoff, depending on the capacities. Unlike pickling, passivation does not remove metal from the treated surface.

At Hydrochem, the treatment of stainless steel by passivation follows a precise and rigorously controlled process. Our teams treat your equipment and supports in our ICPE (Installation Classified for the Protection of the Environment) classified workshops, meeting the strictest standards.

Our passivation process can also be performed on steel substrates or surfaces: learn more about steel passivation.

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