» Increased Corrosion Resistance
» Remove Sulfates from the Surface of Stainless Alloys

» Remove Surface Contamination from Machined Parts
» No Physical or Dimensional Changes

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

Sometimes referred to as “Stainless Steel Pickling”, it is the chemical treatment of a stainless steel surface with a mild oxidant solution. This 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 the manufacturing process, oils, grease and other metallic particles may be embedded or smeared into the otherwise corrosion-resistant stainless steel surface. If allowed to remain on the surface, these particles may oxidize and produce rust spots on the stainless steel. To dissolve the embedded or smeared iron and prevent this condition, semi-finished or finished parts are passivated. Our Passivation process is designed to meet the needs of industrial and commercial customers, thus optimizing the performance of their components.

Passivation 2

We welcome the opportunity to quote your Passivation needs. We can offer sample runs of your part(s) to determine if Passivation can benefit your product line.


» QQ-P-35C
» ASTM A-967 (formerly QQ-P-35C)
» ASTM A-380
» ASTM A-967-05
» ASTM-B-117 (testing for presence of iron on surface)