Anodizing Services
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Anodizing converts the surface of aluminium into a hard, corrosion-resistant oxide that is part of the metal rather than a layer sitting on top of it. Unity Manufacture runs Type II decorative anodizing and Type III hardcoat anodizing to MIL-A-8625, in clear, black and a full range of dyed colours, on CNC machined parts, extrusions and sheet metal assemblies.
What sets Unity Manufacture’s anodizing service apart?
- Both Types In-House: Type II decorative and Type III hardcoat run on the same line, so you can mix cosmetic and wear-critical parts in one order.
- Thickness Verified: Every batch is measured with eddy-current thickness testing, not estimated from bath time, and the readings ship with your parts on request.
- Masking Before Racking: Threads, bores, grounding faces and datum surfaces are masked by default when you flag them on the drawing.
- Colour Consistency: Dye lots are controlled and reference plaques are retained, so repeat orders match the parts you approved the first time.
- Corrosion Tested: Salt-spray testing to ASTM B117 is available for qualification batches, with results documented against your specification.
- Engineering Support: We calculate dimensional build-up before quoting, so you know exactly how the oxide will affect your fits.
Check Out How Unity Manufacture Works In Just A Few Steps
At Unity Manufacture, we’re excited to offer you an easy and efficient way to finish and manufacture your parts. Our online platform allows you to upload your CAD files, select your process and material options, and order your parts in one place.
Request quote
First, you need to upload your 2D and 3D files on our Get a Quote page. Alternatively, you can submit your designs via email
Design review
One of our engineers will review your design and consider any possible manufacturing techniques, then generate a detailed cost estimation within an hour.
Feedback & quote
Your project engineer will provide you with a personalized production plan (including materials, processing tech, surface treatment, and lead time) and a detailed quote.
Start production
Upon quote approval, we’ll start production and keep you updated with progress reports and part photos.
Advantages of Ordering Anodized Parts from Unity Manufacture
Fast Turnaround
Type II anodizing ships in 3 to 5 business days and Type III hardcoat in 5 to 7, including masking and sealing.
Precision
Oxide growth is roughly half inward and half outward. We calculate the build-up per surface and mask or post-machine to keep fits inside tolerance.
Custom Finishes
Clear, black, red, blue, gold, green, grey and orange dyes, plus PTFE impregnation for dry lubrication on sliding surfaces.
Material Selection
We anodize wrought, cast and extruded aluminium, plus titanium and magnesium alloys. Send us the alloy and we will confirm the achievable colour.
Quality Control
ISO 9001 controlled baths with eddy-current thickness checks, seal-quality testing to ASTM B136 and salt-spray verification to ASTM B117.
Worldwide Delivery
Racked and packed to protect the finish in transit, then shipped worldwide with tracking. Get a quote to see delivery options.
Materials We Anodize
Aluminium 6xxx
Aluminium 7xxx & 2xxx
Aluminium Castings
Aluminium Extrusions
Titanium
Magnesium
Anodizing Options
Type II and Type III are not grades of the same finish, they are different engineering choices. Here is how we help you pick.
Type II Anodizing
The standard decorative and protective anodize. A 5 to 25 um sulphuric acid film that takes dye well, and the default choice for enclosures, panels and consumer hardware.
Type III Hard Anodizing
A 25 to 100 um engineering coating produced at low temperature. Chosen where wear resistance matters more than colour, on slides, pistons, manifolds and load-bearing faces.
Sealing & Colour
After anodizing, the porous oxide is sealed to lock in corrosion resistance and dye. The seal you specify changes both performance and appearance.
Masking & Racking
Anodizing does not stop at the edge of a feature. Tell us what must stay bare and we mask it before the part goes into the tank.
Custom finishes upon request
Working to a standard that is not listed, such as AMS 2471, AMS 2472 or a customer-specific specification? Send it with your RFQ and we will quote to it.
Technical Specifications
| Anodizing type | Coating thickness | Surface hardness | Dimensional impact | Colour options | Standard | Lead time |
|---|---|---|---|---|---|---|
| Type II, clear | 5 – 18 um (0.0002 – 0.0007 in) | 200 – 300 HV | +0.0001 – 0.0003 in per surface | Clear | MIL-A-8625 Type II | 3-5 days |
| Type II, dyed | 8 – 25 um (0.0003 – 0.0010 in) | 200 – 300 HV | +0.0002 – 0.0004 in per surface | Black, red, blue, gold, green, grey | MIL-A-8625 Type II | 4-6 days |
| Type III, natural | 25 – 75 um (0.001 – 0.003 in) | 400 – 600 HV | +0.0005 – 0.0012 in per surface | Dark grey to bronze | MIL-A-8625 Type III | 5-7 days |
| Type III, black | 25 – 100 um (0.001 – 0.004 in) | 400 – 600 HV | +0.0005 – 0.0016 in per surface | Black | MIL-A-8625 Type III | 5-7 days |
| Titanium anodizing | Interference film, under 1 um | Not applicable | Negligible | Colour by voltage | AMS 2488 | 4-6 days |
Typical Applications
- Aerospace structural brackets
- Avionics chassis
- Actuator bodies
- Seat and trim hardware
- Automotive and EV battery trims
- Motor end plates
- Suspension brackets
- Interior trim
- Consumer electronics shells
- Camera and optical bodies
- Heat sink covers
- Front bezels and panels
Order Anodized Parts Now
If you want to place an order right away, tap on the request a quote button and place your order immediately.
Overview: What is Anodizing?
Anodizing is an electrolytic process that thickens the natural oxide layer on a metal surface. The part is the anode in an acid bath, and the electrical current grows a controlled, porous oxide that is integral to the substrate. Because the layer grows both inward and outward, roughly half of the final thickness adds to the part and half penetrates it.
Type II anodizing produces a 5 to 25 um film that is primarily decorative and corrosion resistant, and that readily absorbs dye. Type III hardcoat runs at lower temperature and higher current density to build a 25 to 100 um layer that is significantly harder than tool steel and is specified where wear matters. The porous structure has to be sealed afterwards, and the seal choice, hot water, nickel acetate or PTFE, determines the final corrosion performance and coefficient of friction.
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Unity Manufacture Anodizing Resources
Choosing between anodizing types, colours and seals? These guides go deeper on standards and trade-offs.