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home Best Technology / Passivation Equipment & Ultrasonic Passivation Systems for Stainless Steel with Nitric / Citric Acid / Equipment Needed to Start A Passivation Line

Equipment Needed to Start A Passivation Line

If you are planning to build a passivation process, there is more equipment needed than just the passivation system itself.  In this article we will assist our customers in acquiring the other necessary equipment for getting your passivation process up and running.

Passivation Equipment

Passivation equipment and systems are capable of wash, rinse, passivate, rinse and drying parts.  Below are some examples of passivation lines sold by Best Technology

Bench Top Ultrasonic Passivation Equipment

Tabletop Multi-Tank Ultrasonic Passivation System

 

Automated Ultrasonic Passivation Systems

Ultrasonic Automated Passivation System

Citric / Nitric Acid Passivation Wet Bench for Stainless Steel & Titanium 

Wet Bench Electropolishing System with passivation

Automated Agitated Immersion Passivation System

Automated Agitated Immersion Passivation System

 

Other Associated Process Equipment Needed for Passivation of Stainless Steel and Titanium

  1. Purified water system – typically RO or DI Water – ensures a full rinse of parts to ensure no minerals and containments in water are left on parts prior to, during and after acid passivation tank/bath
  2. Heated rinse water source – point of use or central to facility
  3. Part fixturing equipment – holds parts in place during bath immersion but does not adversely affect contact surface during processing (scratches, abrasions, ultrasonic cavitation erosion, etc)

Test Equipment

  1. Chemical titration kit – determines true concentration of acid and alkaline cleaner, pH meter – monitors the acidity or alkalinity (base) of the solutions, Hydrometer measures specific gravity of a solution to determine how much chemistry vs. water is in solution
  2. Chemical maintenance logs – track titrations over time and correlate with any down stream passivation issues/failures
  3. Copper sulfate test kit – most common test to determine if part passes passivation specification.  Other methods include high humidity chamber, salt spray, etc

Chemistry

  1. Aqueous alkaline wash tank cleaner
    1. For parts with true oil contamination
      1. Oil splitting chemistry- oils float to surface of tank and are skimmed off with an oil skimmer / oil removal system
      2. Emulsification-based chemistry- suspends oils in chemistry
    2. For parts with water soluble coolant and fluid contamination
      1. Neutral pH chemistry for light soils
      2. Caustic based chemistry for heavy, hard to remove soils – common = sodium hydroxide based chemistries
  2. Passivation Acid
    1. Nitric Acid- most common for years
    2. Citric Acid – commonly referred to as “Citrisurf” recent advancements have made use more reliable and much easier to handle than nitric

Venting

Passivation systems, especially those using nitric acid, will typically require ventilation, which can add significantly to the system installation cost. Since regulations vary widely from municipality to municipality and from state to state, Best Technology is not able to advise on the specific requirements for your local area. Customers are advised to contact local governing authorities to learn applicable local regulations, and to work with a local HVAC contractor for installation of any required ventilation.

In closing, the above is a generalized list of the passivation equipment necessary to start a passivation system line.  A complete list can be supplied by Best Technology after equipment purchase.

While it may seem overly complicated to some, Best Technology is able to simplify the process into simple steps to achieve a successfully passivated part. See our Services page for more information.

 

Best Technology can help you design your passivation process!

Equipment & Process Questionnaire

Please fill in the information below to better describe your application to us
  • How many processes / part types require cleaning/passivation development?
  • What material type(s) will you be cleaning and passivating?
  • Do your parts have any of the following?
  • Please describe your application including pre and post process manufacturing.
  • What types of oils (true or water soluble) and/or particulate are to be removed? Please provide specific names or MSDS sheets
  • How clean do the parts need to be? Cleanliness spec? Rinse or Dry Spec?
  • Are any of the following processes used during manufacturing: EDM, buffing/polishing, Scotch-Brite / Cratex, blasting, welding, laser marking, etc? Please specify.
  • Do you have a preferred cleaning chemistry? Aqueous, Solvent, etc?
  • What passivation specification if any is required? ASTM A967, ASTM F86, AMS2700, etc. Any specific customer specifications?
  • Do you have a preferred passivation chemistry? Citric or Nitric? *
  • Do your parts have laser markings?
  • Would you like process, equipment and material/chemical handing training? If so, indicate current knowledge and training level.
  • This field is for validation purposes and should be left unchanged.

Latest News & Products from Best Technology

Semi-Automated Inline Citric Passivation Solution with Data Tracking

For one medical device manufacturer, the design of a citric passivation solution faced two major challenges: The manufacturing process required performing a water-break test after cleaning parts, before proceeding to passivation. This meant that they could not use a fully automated passivation solution. The system had to have data tracking for quality control purposes. Semi-Automated […]

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