Chromate Conversion

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Chromate Conversion is unlike anodic finishes in that the alloy's electrical conductivity is maintained. Fort Wayne Anodizing offers three types of chromate conversion, hexavalent, trivalent, and non-hexavalent chromate. Trivalent and Non-hexavalent chromate offers a non-Hex 6, environmentally friendly alternative to meet RoHS and EU ELV directives, while giving you the corrosion protection and adhesive bonding characteristics you require.

The low cost and high adhesion properties make these Chromate Conversions ideal as a primer for paint, rubber or other finish applications. Once treated, the metal surface is very resistant to moisture penetration significantly increasing the durability of the final metal finish, be it paint, powder coating or rubber.

Additional advantages of the Chromate Conversion processes are very low build up on the metal, it typically creates an eye pleasing iridescent color and the coating becomes an integral part of the metal surface. Add restrictive Type II Anodizing or Industrial Hard Coat to the finishing process and you can manage the conductivity, hardness and color to meet a wide variety of design requirements on a very economical basis.

  • Electrical Conductivity …Parts undergoing the Chromate Conversion process remain highly conductive. Conductivity can be managed by adding Type II or Type III restrictive anodizing into the metal finishing process
  • Excellent Adhesion Qualities …Chromated surfaces provide an excellent base for paint, powder coating and rubber, significantly increasing endurance of the finish
  • Thin Surface Build Up …Typical finishes are less than .0000005” in thickness, and can meet very high tolerance requirements
  • Corrosive Resistance …Excellent resistance from the elements, especially to moisture.
  • Wide Application …Extrusions, machined components and castings may all be processed
  • Scratch Resistance …Chromate Conversion film is “self healing: to minor scratches and abrasions
  • Visually Appealing …The process leaves behind a clear or golden iridescent coating on aluminum parts.

 RoHS Compliant 


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Process Type Hexavalent & Non-Hexavalent Chromate Conversion
Process Method Chemical & Temp Controlled
Primary Advantages
  • Corrosion Resistance
  • Excellent adhesion for Paint or Rubber
  • Conductive
  • Forms an Excellent Barrier to Moisture
Fort Wayne Anodizing Production Capacity 3-State of the Art Production Lines
Max Part Size 21' 6" X 17" X 48" (1)
Max Weight 500 lbs.
Corrosive Resistance Excellent
Electrical Property Maintains Conductivity
Galvanic Reaction Low
Hardness N/A
Heat Resistance Moderate
Lubricity Not Recommended for moving part contact
Surface Resistance Scratch Resistant
Thermal Property High Conductivity
Thickness .0000001" to .0000005"
Uniformity Highly Uniform to Complex Shapes
Wear Resistance Moderate
Workability High
Tolerance Specs.
Uncolored Appearance
  • Iridescent
  • Clear to Yellow



Fort Wayne Anodizing operates one of the largest and most advanced Chromate Conversion systems in the country. This highly sophisticated full service operation is prepared to meet or exceed the exacting needs of even the most complex designs and specifications. ISO 9001:2015 approved and certified to military specifications, our Chromate Conversion systems deliver high quality results on time and on budget. FWA's expertise includes: automotive, medical, military, weapons, marine, aerospace, culinary, robotics and electronic applications. Our systems can process both long and short runs on parts as small as rivets or as large as 21' long.

  • Capacity to Match Your Needs …three quick turnaround production lines and the flexibility to process a variety of jobs, large or small.
  • Just Right Chemistry …from the 1 st to the 10,000 th part chemical concentrations are maintained to very high standards.
  • No Crossover Contamination Risk …all three production lines operate independently. Each utilizing their own temperature and electronic control system.