Citric Acid Passivation

For world-class citric acid passivation services, look no further than RP Abrasives. We use citric acid to passivate steel because it’s the most effective and environmentally friendly option available. Citric acid provides a superior barrier to the surface of steel and – since it’s not a hazardous waste – is also easy to dispose.
Using the citric acid passivation method, you can improve a piece of steel’s resistance to staining considerably. Though steel can never been 100% stain-proof, our citric passivation process gets it as close to that as possible. During passivation, a protective microscopic film is allowed to form on the surface once exposed to the air or an open containing environment, which then protects from corrosion.

Our Citric Acid Passivation of Stainless Steel Services Include:

  • Passivating from small batch sizes to large 3’x3’x3′ sizes
  • Passivate using deionized water and citric acid
  • Testing of passivated parts with a copper sulfate test
  • Cleaning of parts before passivation

RPA passivates in accordance to ASTM A-967-05.7(7.1.1 thru and rinse 7.2 testing is preformed according to spec A-967-05.15 practice B. All parts are cleaned or descaled to ASTM spec A-380-06. 5.3, 6.2.1, 6.2.2, 6.2.5, 6.2.8, 6.2.11.

Get a Citric Acid Passivation Quote Today!

For a no-obligation stainless steel passivation consultation, call us today at (603) 335-2132 or email We’re based in New Hampshire, but we offer services to customers throughout Massachusetts, Maine, Vermont, Connecticut, Rhode Island, New York and nationally.