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home Best Technology / Case Studies – Industry Applications / Electropolishing Wet Bench with Nitric Acid Neutralization / Passivation

Electropolishing Wet Bench with Nitric Acid Neutralization / Passivation

Acid Neutralization Application

The medical device electropolishing wet bench has multiple polypropylene tanks to electropolish, rinse, nitric acid passivate / neutralize, and 2 final cascade overflow rinse tanks. This electropolishing wet bench has incoming parts already cleaned so electropolishing is the first stage.  Other wet bench systems can have part cleaning and rinsing before the electropolishing stage.

See our page on How Electropolishing Works for a detailed explanation of electropolishing and the electrochemical process used to uniformly remove material from stainless steel and other material composition parts.

Electropolishing Wet Bench with Nitric Acid Passivation / Neutralization with Exhaust

Wet-Bench-Electropolishing-System-with-nitric-acid-passivation

Because the nitric acid is heated, it needs to be properly vented.  The electropolishing wet bench is fully enclosed for this reason.  Nitric acid serves not only as a passivation solution, but also to neutralize and fully “rinse” any electropolishing electrolyte from the part to ensure there is no residual phosphates or bromides remaining on the part which regular DI / RO rinse water can not remove easily.

Although the electropolishing process technically removes free irons from the surface to the level that some would say the part is passivated, it actually removes not only free irons but also chromium and therefore, needs to be acid passivated to remove free irons while leaving chromium and forming a truly passivated layer.

Industry

Medical device, surgical, orthopedic implant and medical instrument

Applicable Systems

Wet Bench for Electropolishing, Citric / Nitric Passivation, and Wet Chemical Processing

 

 

 

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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  • Industrial Parts Washers
    • Products
      • Agitated Immersion Heated Parts Washer
      • Automatic Parts Washer System with Conveyor
      • Phosphating Lines
      • Oil Removal Systems
    • Case Studies
      • Pipe Washing Equipment
      • Machine Shop Parts Washer for True Oil
      • Automotive Parts Washer System
  • Ultrasonic Cleaning Systems
    • Product Information
      • How Clean is Clean?
      • How Do Ultrasonic Cleaners Work?
    • Products
      • Ultrasonic Benchtop Parts Cleaner
      • Benchtop Ultrasonic Parts Cleaning Multi-Tank Systems
      • Ultrasonic Cleaning Consoles
      • Automated Ultrasonic Parts Cleaning Equipment Wash-Rinse-Dry
      • Large Ultrasonic Cleaner with Agitated Immersion
      • Immersible Ultrasonic Transducers
      • Vapor Degreasers
    • Case Studies
      • Machine Shop Parts Washer for Swiss and CNC Precision Parts
      • Applicable Articles
  • Passivation Equipment
    • Product Information
      • What is Passivation? How Does It Work?
      • Nitric vs. Citric Acid Passivation
      • CitriSurf – Citric Acid Passivation
    • Products
      • Benchtop Ultrasonic Passivation Equipment
      • Passivation Wet Bench for Citric / Nitric Acid
      • Ultrasonic Automated Passivation Equipment
      • Agitated Immersion Multi-Tank Passivation Systems
    • Case Studies
      • Automated Ultrasonic Passivation System for Medical Device Parts
      • Cleanroom Space Saving Automated Passivation System
      • Heated Polypropylene Acid Passivation and Rinse Tanks
      • Applicable Articles
  • Electropolishing Equipment
    • Product Information
      • What is Electropolishing? How Does Electropolishing Work?
      • Electropolishing Cycle and Current Calculator
      • What is Dry Electropolishing? How Does It Work?
      • Passivation vs. Electropolishing
    • Products
      • Table Top Electropolishing Equipment & Electropolishing Machines
      • Electropolishing Wet Benches
      • Large Scale Part Electropolishing Systems
      • Dry Electropolishing Machines
    • Case Studies
      • EP System – Open Top Wet Bench with Spray Rinse
  • Surface Finishing Systems
    • Alodine Lines
      • What is Alodine / Chem film / Chromate Conversion Coating?
      • Alodine Chem Film Tank Line
      • Hex Chrome Phase Out and Alternatives for Conversion Coating
    • Mass Finishing Machines
      • Centrifugal Barrel Finishing Machines
      • Vibratory Bowl Polishers
    • Titanium Anodizing
      • What is Titanium Anodizing?
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  • Wet Benches
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      • Wet Benches for Semiconductor & FM4910 Applications
      • Wet Benches for Citric / Nitric Passivation of Stainless Steel and Titanium
      • Wet Benches for Electropolishing
      • Cascade Overflow Rinse Tanks
      • Quick Dump Rinse Tank
    • Case Studies
      • Semiconductor Chemical Processing Wet Bench and Fume Hood
  • Specialty & Custom Industrial Process Systems
    • Automated Chemical Neutralization Tank Cart
    • Vapor and Dryfilm PTFE Coating Systems
    • Heated Hot Air Parts Dryer
    • Solvent Recovery Equipment
  • Chemistries, Solvents & Fluids
    • Product Information
      • Why Use a Parts Cleaning Solvent?
      • Solvent Cleaning with 3M Novec Engineered Fluids
      • Thermal Management / Heat Transfer with 3M Fluorinert and Novec Fluids
    • Products
      • BestSolv™ Solvents and Engineered Fluids
      • 3M Novec Engineered Fluids, Fluorinert Liquids, Solvents & Chemicals
      • Aqueous Cleaning Chemistries
    • Solvent Phase-outs
      • 3M™ Novec™ HFE Engineered Fluids Replacements and PFAS Phase Out
      • nPB Replacement
    • Case Studies
      • 3M Novec 72DA 73DE Solvent Vapor Degreaser For Medical Device Instruments
  • Process Validation Templates
  • Equipment Financing

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