Aluminum Hardcoating
Dav-Tech Plating's hardcoating process is designed to ensure the control of even the most critical dimensional specifications required for your high-performance applications. 
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Aluminum hardcoating defined
Hardcoating, also called hard anodizing, involves converting an aluminum surface into aluminum oxide using a sulfuric acid electrolyte. The process involves both penetration and build up on all affected surfaces.
The process is similar to sulfuric acid anodizing, though hardcoating baths typically run at lower temperatures, higher amperages and higher voltages.
Dav-Tech Hardcoat Anodizing Properties
| Thickness |
.002” to .004” |
| Penetration |
50% |
| Buildup |
50% |
| War Resistance |
Excellent
Can be processed to meet specific requirements.
|
| Corrosion Resistance |
Excellent
Can be processed to meet specific requirements.
|
| Available finishes |
- Natural color
- Black
- Colors
- Teflon® Impregnated
|
| Reference Specifications |
Meets or exceeds all requirements of:
- MIL-A-8625
- Type III
- Other military and commercial specifications
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| Compliance |
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Benefits of Dav-Tech Hardcoat Anodizing
Dav-Tech Plating's hardcoat anodizing, when properly applied, can enhance the ability of a light metal (aluminum) to withstand heavy wear application as well as severe corrosive environments.
Other benefits of Dav-Tech Hardcoat include:
- Abrasion, corrosion and erosion resistance
- Low coefficient of friction
- Flame resistance
- Dielectric properties
- Excellent heat emissivity
- Safe for food stuffs (cookware)
- Non-contaminating to blood supplies (medical instrumentation)
- Ceramic-like
- Lightweight
- Applicable to most aluminum alloys
Planning for Dav-Tech Hardcoating
The total thickness of the anodic coating produced during hardcoating is 50% penetration and 50% buildup. This penetration feature renders the coating integral with the substrate and differentiates it from other electrolytic coatings.
It also requires planning of critical dimensions on parts that need to be hardcoated.
Example: A 1.000” diameter shaft hardcoated .002” will increase to 1.002" as a final diameter, representing a .001" buildup per side. Similarly, a 1.000" bore will decrease to .998".
The typical hardcoating thickness of .002” to .004” can be controlled to close tolerances and can be finished by precise abrasive methods to meet extremely fine dimensional requirements.
Download our Hardcoat Datasheet
Learn about our Other Finishes
Hard Anodized Aluminum | Aluminum Anodize | Aluminum Anodizing | Hardcoat Anodize | Hardcoat Anodizing | Colored Anodizing
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