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Alodine / Chem film Coating

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home Best Technology / Case Studies – Industry Applications / Alodine Chem Film Tank Line

Alodine Chem Film Tank Line

Application

The Best Technology chromate conversion coating system allows for flexible manufacturing of many chem film and Alodine® needs. System can also be designed and built for both MIL-DTL-5541 Type 1 hexavalent chromium and Type 2 hexavalent chrome free processes.  System tank configuration is dictated by Type 1 or 2 classification.

MIL-DTL-5541 Type 2 hexavalent chrome free equipment

This particular system for the aerospace industry is a hexavalent free, trivalent chrome line using TCP-HF (hex free) coating.

alodine-tank-line-chem-film-equipment

Type 2 Hex-Free chem film surface conversion process with TCP-HF, using Acid Clean process (typically 5 steps):

  1. Acid Clean – A general washing in a cleaning solution takes place as a pre-process step. This ensures that dirt, oil, and any residue formed from prior manufacturing or packaging processes is removed before the coating begins. Then a rinse and dry takes place.
  2. Rinse – cascade counterflowing – Ensure any detergents are removed from the part. A water-break-free test is often performed.
  3. Trivalent chromium, hex-free chrome coat – The surface conversion process takes place when the aluminum is immersed in the tank. The chromate conversion coating gets applied immediately. The period of time that it remains in immersion varies based on the method of the application, the composition of the film and the composition and size of the part itself.
  4. Rinse – cascade counterflowing
  5. Second Rinse is used in the type 2 method of surface conversion coating known as TCP-HF.

MIL-DTL-5541 Type 1 hexavalent chromium chromate conversion coating line

For MIL-DTL-5541 Type 1 hexavalent chromium lines, the Alodine coating tank configuration is designed and built with typically 9 chem film tanks which are commonly at elevated temperatures.

chromate-conversion-alodine-tank-line-system

Type 1 hex chrome conversion coating process (typically 9 steps):

    1. Clean – similar to Type 2 above
    2. Rinse
    3. Etch – If there are any areas that the chem film should not be applied to, the etching process covers those areas.
    4. Rinse – Ensure any etching chemistry is rinsed to stop the etching process.
    5. Deox –  Deoxidation of the part occurs next, to remove any excess materials and oxides, contaminants and chemicals.
    6. Rinse – Remove any deox solution.
    7. Chem film coat
    8. Rinse
    9. Warm rinse.

Video: Alodine Line for Hex-Free Chromate Conversion Coating

Alodine chem film chromate conversion equipment tank line

Typical Chem Film Line and System Configurations (Custom Sizing Available)

Since each customer’s application is unique, the chem film and Alodine coating equipment is designed to specific and to order. In general tanks ranging from 12″ x 12″ x 12″ to 96″ x 144″ x 96″ can be built with various materials from metals, plastics and polymers as well as hybrids. Based on chemicals used in the wash and chromate conversion coating system, various polymers are used for tank materials but most often polypropylene.

Chem film / Alodine Equipment

Chem film / Alodine line - large scale
Chem film / Alodine line - large scale
Chromate conversion equipment for alodining
Chromate conversion equipment for alodining
Chem film tanks used for alodining
Chem film tanks used for alodining
Alodine / Chem film line - cleaner tank
Alodine / Chem film line - cleaner tank
Chem film alodine tank with Ph meter and Dosing Pump
Chem film alodine tank with Ph meter and Dosing Pump
Alodine system - Electrical panel with PLC / HMI touchscreen
Alodine system - Electrical panel with PLC / HMI touchscreen

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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14040 23rd Avenue N.  
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  • Industrial Parts Washers
    ✛
    • Agitated Immersion Heated Parts Washers
    • Inline Conveyor Wash-Rinse-Dry Parts Washers
    • Immersion Inline Parts Washer
    • Spray Cabinet Parts Washers
      ✛
      • Front Load Spray Cabinet Parts Washer
      • Top Load Spray Cabinet Industrial Parts Washer
    • Vertical Door Pass Through Parts Washer
    • Rotary Drum Parts Washer
    • Powder Coat Prep Equipment
    • Phosphating Lines
    • Pipe Washing Equipment
  • Precision Cleaning Systems
    ✛
    • Applicable Articles
    • How clean is clean?
    • How Do Ultrasonic Cleaners Work?
    • Ultrasonic Benchtop Parts Cleaner
    • Benchtop Ultrasonic Parts Cleaning Multi-Tank Systems
    • Ultrasonic Cleaning Consoles
    • Automated Ultrasonic Parts Cleaning Equipment Wash-Rinse-Dry
    • Large Scale Automated Precision Aqueous Cleaning for Cellular Manufacturing
    • Agitated Immersion Ultrasonic Parts Washer
    • Machine Shop Parts Washer for Swiss and CNC Precision Parts
    • Immersible Ultrasonic Transducers
    • Vapor Degreasers
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    ✛
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    • CitriSurf – Citric Acid Passivation
    • Benchtop Ultrasonic Passivation Equipment
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    • Automated Ultrasonic Passivation System for Medical Device Parts
    • Passivation Wet Bench for Citric / Nitric Acid
    • Cleanroom Space Saving Automated Passivation System
    • Heated Polypropylene Acid Passivation and Rinse Tanks
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      • What is Alodine / Chem film / Chromate Conversion Coating?
      • Alodine Chem Film Tank Line
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      • Centrifugal Barrel Finishing Machines
      • Spin Dryers / Chip Wringers
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    • Citric / Nitric Passivation Wet Bench for Stainless Steel & Titanium
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    • Quick Dump Rinse Tank
  • Specialty & Custom Industrial Process Systems
    ✛
    • Automated Chemical Neutralization Tank / Cart
    • Vapor and Dryfilm PTFE Coating Systems
    • Heated Hot Air Parts Dryer
    • Solvent Recovery Equipment
  • Precision Cleaning Chemistries, Solvents & Fluids
    ✛
    • Why Use a Parts Cleaning Solvent?
    • 3M Novec Engineered Fluids, Fluorinert Liquids, Solvents & Chemicals
    • Solvent Cleaning with 3M Novec Engineered Fluids
    • Thermal Management / Heat Transfer with 3M Novec and Fluorinert Fluids
    • 3M Novec 72DA 73DE Solvent Vapor Degreaser For Medical Device Instruments
    • Solvent Phase-outs
      ✛
      • AK225 HCFC-225 Phase Out and Replacement with 3M Novec HFE Engineered Fluids
      • Medical Device AK 225 Replacement with 3M Novec Engineered Fluid Solvent
      • nPB Replacement
    • Aqueous Cleaning Chemistries
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