Chromate conversion coating services
Chromate conversion coating, more commonly known as chem film or by its brand name Alodine, is a type of conversion coating, used on aluminum as a corrosion inhibitor, as a primer for paint due to increased adherence or to preserve electrical conductivity.
| Surface preparation | Colors | Applicable materials | Thickness | Cosmetic availability | Visual appearance |
|---|---|---|---|---|---|
| As machined (Ra 3.2μm / Ra 126μin) | Clear/ slight yellow tint | Aluminum (7xxx series not recommended) | None | No | Machining marks are visible |
| Bead blasted (Glass beads #120) | Clear/ slight yellow tint | Aluminum (7xxx series not recommended) | None | Cosmetic on request | Machining marks are completely removed on "cosmetic" parts but may be visible on "non-cosmetic" parts |
Example of a chromate conversion coated part
The DTSS-3D chromate conversion coating process
Chromate conversion coating is a chemical coating that protects aluminum from corrosion, serves as a primer for painting and preserves electrical conductivity. At DTSS-3D, we only use chromium-free, RoHS compliant clear chromate conversion coating.
Here’s how DTSS-3D operators apply chromate conversion coating:
-
Parts are cleaned and degreased to remove any contaminant
-
Parts are then rinsed to eliminate any residue of detergent
-
Conversion coating is then applied by immersing the aluminum parts in the tank. The chromate conversion coating gets applied immediately
-
Parts are then rinsed again
Put your chromate conversion coated parts into production today
Get instant quote