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CitriSurf Citric Acid Passivation

The CitriSurf® citric acid cleaning and passivation process is based on cutting edge technology using safe and environmentally friendly citric acid to remove the free iron from the surface of stainless steel.

CitriSurf technology has proven to be a vast improvement over the traditional nitric acid formulations and provides a safe stainless steel citric acid passivation process. After stripping the iron from the surface, the citric acid forms a water soluble complex with the iron ions, tying them up so that they are no longer able to have a negative impact. The CitriSurf bath will not allow the iron to precipitate again like nitric acid is known to do. In addition, citric acid does not pose the health and environmental hazards that are present with nitric acid. By their very nature, CitriSurf products are non toxic, non-corrosive and biodegradable. Citric acid is the natural organic acid found in oranges and other citrus fruits. It is Generally Regarded As Safe (GRAS) and is commonly used in many foods and beverages. This means that CitriSurf is compatible with the environment and can usually be disposed into sanitary sewage systems with minimal waste treatment to meet environmental agency approvals.

Conversely, nitric acid is very corrosive by nature, represents significant personnel hazards, and threatens property as well. It is also an oxidizer which increases risk and expense. Heated, its risk is intensified. After use, expensive waste treatment is necessary prior to disposal, and can expose the user to long term liability under regulatory agencies.


CitriSurf solutions provide the maximum protection for a passivation procedure by providing:

  • Improved removal of free iron from the surface

  • Faster removal of free iron from the surface

  • Low hazard chemistry

  • Environmentally safe chemistry

  • Lower cost

  • Passivated surfaces that pass all salt spray, immersion and high humidity tests

Industries That Use Citrisurf

CitriSurf® can be and is used in any industry where stainless steel is found, including but not limited to:

  • Industrial

  • Parts Manufacturing

  • Metalworking and Fabrication

  • Process Cleaning

  • Facilities Maintenance Food and Beverage

  • Food Process Equipment

  • Brewery, Winery, Distillery, and Other Beverage Process Equipment Pharmaceutical

  • Process Equipment Medical

  • Dental and Orthodontic Instruments

  • Surgical Instruments

  • Medical Equipment

  • Orthopedic Implants Architectural

  • Handrails

  • Catwalks

  • Facades Transportation

  • Aerospace

  • Marine

  • Automotive

  • Rail

  • Trucking Military

  • Suppliers

  • Maintenance Petroleum

  • Equipment Maintenance

  • Rig Maintenance Electronics

  • Semiconductor Equipment

  • UHP Devices

  • Electrical Enclosures Artistic

  • Sculptures Consumer

  • Damaged Stainless Kitchen Appliances

  • Brass and Bronze Tarnish Removal

For any inquiries, please call 1-800-467-7122 or Contact Us/RFQ.

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