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 chromate conversion coated parts
How does chromate conversion coating work?
Chromate conversion coating involves adding chromic acid to a metal in a chemical process that results in a thin, protective outer layer. This enhances a metal’s durability and makes it more resistant to corrosion.
Hubs offers chromate conversion coating for aluminum parts to improve functional properties. To find out more, contact firstname.lastname@example.org.
Here’s how we apply chromate conversion coating:
Parts are cleaned and degreased to remove any contaminant
Parts are then rinsed to eliminate any residue of detergent
Aluminum parts are immersed in a tank containing the chemical solution
Parts are removed when a film of the desired thickness coats the surface
Parts are then rinsed again
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