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Passivation Systems

What is Passivation? ASTM A380 Standard says "Passivation is the removal of exogenous iron or iron compounds from the surface of a stainless steel by means of a chemical dissolution, most typically by a treatment with an acid solution that will remove the surface contamination but will not significantly affect the stainless steel itself."

Any machined or cold formed stainless steel part that is expected to stand up to the most extreme elements in nature and maintain a pristine appearance will most likely need to undergo passivation after initial cleaning. Though practically invisible, tiny free iron particles and other soils may become embedded in the surface during the manufacturing process and can cause surface rust upon exposure to the environment.

This process of passivation promotes the formation of a thin layer of oxidation on the part surface which acts as a protective coating. This film is about 100,000 times thinner than a human hair and though the layer can be removed through abrasion, it is extremely durable. The chemical action of passivation, will actually penetrate 0.00508mm deep into the surface of the material.

The ultrasonic cleaning and passivation systems provided by Cleaning Technologies Group utilize industry compliant materials and fabrication techniques to ensure that they are process capable for providing repeatable and reliable results. State of the art design techniques include redundant control measures, process traceability through data collection/access software, sanitary plumbing and filtration loops, and controlled environments.

Combining ultrasonic cleaning with pickling, passivation, rinsing, neutralization, and drying and other processing steps in a unitized cleaning console helps assure process integrity. The addition of an automated, robotic transfer system provides process consistency and significantly reduces the labor required for part processing. In addition, by using a single system your inventories can be significantly reduced.

CTG has many years of experience providing cleaning solutions ranging from the removal of gross contaminant up to precision cleaning at the sub-micron level. This breadth of knowledge and experience means that you will receive the right process solution for your specific needs.

We have provided passivation systems to the medical and aerospace industries around the globe, utilizing our own Blackstone-NEY Ultrasonic generators as a core component of every system. Contact us early in your investigate stage since we will make our years of experience available to you and assure that you define a system that will meet all of your needs both today and into the future.

Processes Available: Etch • Wash • Rinse • Passivate • Neutralize • Dry (Multiple Rinse or Dry Stages Available)
Process Type: Batch
Part Orientation: Random or Fixtured in Basket
Production: Low to High Volume
Max Work Envelope: Up to 36" Wide x 60" Deep x 36" High
Method of Loading / Unloading: Manual or Automatic
Footprint: (Varies by number of stages)
Cleaning Mechanisms: Immersion / Ultrasonics / Megasonics / Spray Over Immersion / Turbulation
Drying Mechanisms: High Volume, Heated HEPA Filtered Air / Vacuum Dry
Controls" Programmable Controller & HMI Touch screen
Typical Applications:
  • Medical Components and Devices
  • Pharmaceutical
  • Dental Components
CTG Passivation Systems