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Machining & Finishing
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Anodizing for Prototyping
and Production
*Type in Parenthesis
MIl-PRF-8625 (IA)
MIl-PRF-8625 (IB)
MIl-PRF-8625 (IC)
MIl-PRF-8625(II)
MIl-PRF-8625(III)
ASTM D1730
ASTM B580
SAE AMS2469J
AAMA 611-98 (A4)
AAMA 611-98(A3)
ASTM D3933-98
ASTM B580
Self-Serve Options on Platform
| Standard | Type | Composition | Application Examples |
|---|---|---|---|
| MIL-PRF-8625 | Type II | Sulfuric Acid | Good for hardness and resistance to abrasion, such as optical components and hydraulic valve bodies |
| MIL-PRF-8625 | Type III (w/ PTFE available) |
Sulfuric Acid (Hard Coat) | Cookware; Good thermal resistance, electrical insulation, abrasion/wear resistance, and strong finish |
| Class Designations apply to Sealing: Class 1, non dyed; Class 2, dyed, color to be specified. | |||
Available Through RFQ Only
| Standard | Type | Composition | Application Examples |
|---|---|---|---|
| ASTM D1730 | Type 2, Method 1 (MIL-A-8625 equiv.)Zn |
Sulfuric Acid | Anodized finishes requiring dyeing, saltwater resistance, kitchen appliances |
| ASTM B580, type A equiv to hard coat |
AKA Type III | Sulfuric Acid (Hard Coat) | Cookware; Good thermal resistance, electrical insulation, abrasion/wear resistance, and strong finish |
| SAE AMS2469J equiv to hard coat |
AKA Type III | Sulfuric Acid (Hard Coat) | Cookware; Good thermal resistance, electrical insulation, abrasion/wear resistance, and strong finish |
| AAMA 611-98 | Class I (A4) | Sulfuric Acid | Aerospace parts requiring high performance architectural aluminum anodic coating; kitchen applicances |
| AAMA 611-98 | Class II (A3) | Sulfuric Acid | General use commercial architectural anodic coating |
| ASTM D3933-98 | N/A | Phosphoric Acid | Structural adhesive bonding; aerospace parts |
| ASTM B580 | Type G (MIL-A-8625 Type I equiv.) |
Chromic Acid | Provides a good surface for paint and adhesive bonding |
| MIL-PRF-8625 | Type IA | Conventional Chromic Acid | Paint primer for aerospace parts |
| MIL-PRF-8625 | Type IB | Low Voltage Chromic Acid | Modified Type I used for 7XXX series aluminum alloys |
| MIL-PRF-8625 | Type IC | Non-Chromic Acid Electrolyete | Improves paint adhesion and fatigue resistance |
| *May increase quote time, lead times, and costs | |||
*Custom colors available, upon request
Anodizing is a conversion coating process that involves immersing aluminum into an acid electrolyte bath and passing an electric current through it. This creates a robust and fully integrated coating of aluminum oxide on the surface of the aluminum, replacing the naturally occurring oxide layer and penetrating through to the base metal. Unlike paint, anodizing doesn’t chip or flake.
Durability (wear resistance)
Abrasion resistance
Increased hardness
Corrosion protection
Cost-effective
Longevity
Desirable electrical properties
95.4%
Perfect order success rate (on-time, in-full delivery)
Get Instant QuoteAlodine, a chemical conversion coating, also known as "chem film," is a thinner conversion coating that is conductive and is commonly used in conjunction with masking in anodized parts. In contrast, anodizing is a thicker coating created by immersion with electrical current. Chem film is an excellent base primer for paints and provides corrosion protection. MIL-DTL-5541 is the common military specification for chemical conversion coating.
Part of the anodizing process is to remove the naturally occurring oxide layer, in a process called deoxidizing, by immersing the parts in an acidic solution. The electrochemically formed oxide layer is thicker than the naturally occurring oxide layer. Therefore, the build-up is actually less than the coating thickness, or the actual dimensional growth is less than the thickness of the anodized oxide layer. Here are the terms commonly utilized in anodizing and you can see these in more detail in the image below:
Your parts may require masking, if you have tight tolerances on your threads or holes. This may even be applicable for a thinner, Type II MIl-PRF-8625 coating. Masking may be accomplished with plastic plugs, tape, or even painted-on liquid plastics. Masking should be called out on a drawing with notes. If you have questions about masking or plugging, contact one of our experts today.
Fictiv also offers other finishes for your machined parts, including:
