Passivation

Key Benefits

• Increased resistance to corrosion due to the removal of contaminants
• Removes exposed sulfides from the surface of stainless alloys
• Removes surface contamination from machined parts
• Safe removal of iron
• Removal of any trace of carbon steel
• No dimensional change
• Metallically pure, free of scale and discoloration

Passivation or sometimes referred to as "Stainless Steel Pickling" is the chemical treatment of a stainless steel surface with a mild oxidant solution. A mild oxidant is exposed to the surface, creating a chrome-rich oxide film. This passive condition results in a reduced corrosion rate of metal. A surface film is created that causes the metal surface to lose its chemical reactivity.

Passivation is necessary because many times during handling and processing such as rolling, forming, machining, pressing, stamping, tumbling, and lapping, particles of iron or tool steel or abrasive particles may be embedded in or smeared on or into the surfaces of stainless steel components. If allowed to remain on the surface, these particles may corrode and produce rust spots on the stainless steel. To dissolve the embedded or smeared iron and prevent this condition, as well as restore the original corrosion-resistant surface, semi-finished or finished parts are passivated. This process usually leaves the stainless steel with a white matt appearance.

Passivation is a commonly required process for products manufactured for the medical, electronics, aerospace, and food processing industries.

Our passivation process is designed to meet the needs of industrial and commercial customers.

For more information Email, call (800)275-3901 or request a quote on our passivation services today!

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