Aluminum Plating Specifications
Chromate Conversion Coating (Chem Film)
Chromate conversion coating, also known as chem film, is an economical surface treatment specifically designed for aluminum substrates. This chemical process creates a protective conversion layer that serves as both a paint base and a corrosion barrier at a more cost-effective price point than anodizing.
ASTM B-449 Specifications For Chromates On Aluminum
| Class | Color |
|---|---|
| Class 1 | Yellow to Brown1 |
| Class 2 | Colorless to Yellow |
| Class 3 | Colorless |
| Class 4 | Light Green to Green (Not Available) |
Primary Applications:
- Electronics housings
- Instrumentation components
- Communications hardware
Other ASTM Specifications
Also see, Coating Specifications by Substrate, and our full list of Capabilities.