Our Alodine Finish Services
Provide MIL-DTL-5541F compliant chemical conversion coatings for aluminum alloys. Our automated processing lines handle parts up to 3m length, offering Type I (chromate) and Type II (chromate-free) options with color variations from clear to golden iridescent.
What is Alodine Finish?
A chemical conversion coating process where:
Aluminum reacts with chromate/trivalent chromium solutions
Forms protective aluminum oxide/chromate compound layer
Typically 0.5-4μm thickness
Key specifications:
Coating weight: 0.1-0.4 mg/cm²
Salt spray resistance: 168-500+ hours
Electrical resistance: <5 mΩ per square
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Alodine Advantages
- Corrosion Protection - 5x better than bare aluminum
- Paint Adhesion - 100% crosshatch adhesion (ASTM D3359)
- Electrical Conductivity - Maintains EMI shielding
- Lightweight - Adds negligible mass
- Fast Processing - 1-5 minutes immersion time
Notes
- Material compatibility: 2000/6000/7000 series aluminum
- Post-treatment: Rinse within 30 seconds critical
- Color variation: Batch-dependent
Alodine Applications
- Aerospace: Aircraft skins, structural components
- Electronics: Heat sinks, chassis
- Automotive: Engine parts, trim
- Military: Weapon systems, vehicle armor
- Marine: Hull components, deck hardware
