Aluminum 6061
Common material for this finish.
View materialSurface Finishing
Chromate Conversion Coating (Chem Film / Alodine)
Chem film is a chemical conversion coating for aluminum that improves corrosion resistance and paint adhesion while keeping the surface electrically conductive. Alodine and Iridite are common trade names.
Specification
Typical options
| Option | Appearance | Notes |
|---|---|---|
| Type I (hexavalent chromium) | Gold / yellow to brown | Strong corrosion performance; regulated chemistry |
| Type II (trivalent / non-hexavalent) | Clear to light iridescent | RoHS-friendly alternative |
| Class 1A | — | Maximum corrosion protection |
| Class 3 | — | Lower electrical resistance for conductivity |
| Common spec | MIL-DTL-5541 | State Type and Class on drawing |
Typical industry ranges for reference. Final thickness, color, and specification are confirmed on your quote and drawing.
Design Tips
What to specify on your drawing
Negligible thickness
Adds essentially no measurable dimension; usually no masking needed for fits.
Grounding
Ideal for grounding and EMI contact surfaces.
Paint base
Common pre-treatment before powder coating or painting.
Handling
Coating is thin and can be scratched; avoid if wear resistance is needed.
Compatible Materials
Materials often paired with this finish
Aluminum 5052
Common material for this finish.
View materialAluminum 2024
Common material for this finish.
View materialSurface Finishing Service
See all finishing and post-processing options.
View serviceAdd a Finish
Include finish requirements with your RFQ.
Note the finish, specification, color, thickness, and masked areas on your drawing so the quote reflects them.