Custom Aluminum Anodizing Services
Custom anodizing for aluminum sheet metal and machined parts. Type II sulfuric and Type III hard anodizing with masking, color options and inspection in one IATF 16949 certified facility serving global machinery buyers.
Inspection File
- Type II sulfuric and Type III hard anodizing
- Natural, black and dyed color options
- Masking for threads and contact points
- IATF 16949:2016 certified quality management system
Specifications
| Process | Sulfuric acid anodizing (Type II) and hard anodizing (Type III) |
|---|---|
| Colors | Natural, black and dyed colors |
| Coating thickness | Per drawing specification |
| Masking | Threads and contact points masked per drawing |
| Inspection | Appearance and coating check |
Product Detail
Custom Aluminum Anodizing Services for Sheet Metal and Machined Parts
ChunTian provides custom anodizing services for aluminum sheet metal parts, brackets, enclosures and machined components. Parts are anodized after forming and fabrication in the same facility, so dimensions and datums planned at the drawing stage are carried through to the finished surface.
The pain point: anodizing mistakes that turn parts into scrap
Anodizing is a conversion coating, not a paint job: once it is applied wrong, there is no simple strip-and-recoat recovery for a precision aluminum part. When anodizing is outsourced to a vendor who never saw the drawing, the failures are predictable. Threads, contact points or grounding areas that should have been masked come back coated — a plugged thread or a lost electrical contact is discovered only during your assembly. Coating thickness applied without attention to dimensional growth interferes with precision fits. And because aluminum anodizing takes color differently with each alloy and process condition, components anodized in different batches or different shops arrive with visible color mismatch when you assemble them into one enclosure.
The procurement impact is severe: in many cases the only correction is scrap and reorder, which means a new production lead time — not a quick rework. Add color disputes between two suppliers, and a simple finishing step becomes the reason an entire order misses its date.
Our solution: anodize inside the fabrication flow, with every requirement anchored to the drawing. Masking is planned against the drawing before processing, coating class and thickness are confirmed at quotation, and the team that formed the part checks the finished surface against the same datums it machined — so dimensional and cosmetic questions are resolved by the people who can actually see the drawing, not by a vendor interpreting a carton of parts.
Anodizing options for buyer applications
- Type II sulfuric anodizing: corrosion protection with natural, black and dyed color options — the standard choice for enclosures, brackets and visible components.
- Type III hard anodizing: a thicker, harder coating for wear-prone surfaces such as sliding faces and mounting interfaces, where ordinary anodizing would wear through.
- Masking and racking: threads, contact points and grounding areas are masked against the drawing before processing, so functional features stay conductive and assembly-ready.
Color and thickness, anchored to the drawing
Colors are available in natural, black and dyed options, matched to your reference. Coating thickness is controlled per drawing specification — and because anodizing builds dimension on the part, thickness expectations are confirmed at quotation together with the alloy and coating class, so precision interfaces are discussed before processing instead of discovered at assembly. Alloy, coating class, color reference and masking requirements are all confirmed up front in writing.
Quality checks and documentation
Anodized parts are inspected for appearance and coating against the agreed specification, and inspection records are prepared with the shipment. Production runs under our IATF 16949:2016 certified quality management system — the same system that governs the upstream forming, fabrication and machining of your parts, so accountability for the finished surface stays in one place.
What buyers should specify with the drawing
Share the drawing or 3D model with the alloy, coating class (Type II or Type III), color reference and any masking requirements. Our team confirms the achievable result and provides a quotation and lead time for your review. If your part has precision fits or sliding surfaces, flag them — that is exactly where coating class and thickness need to be agreed before processing.
Typical applications
- Aluminum enclosures and housings where corrosion protection and a consistent cosmetic color are both required.
- Brackets and structural aluminum parts that need a durable surface without a paint layer that can chip.
- Machined components with sliding faces or wear-prone interfaces suited to Type III hard anodizing.
- Parts with threads, contact points or grounding areas that must stay bare through the anodizing process.
Frequently asked questions
What is the difference between Type II and Type III anodizing?
Type II sulfuric anodizing provides corrosion protection with natural, black and dyed color options, and is the standard choice for enclosures and visible components. Type III hard anodizing produces a thicker, harder coating for wear-prone surfaces such as sliding faces and mounting interfaces. The right class depends on your application — confirm it with us at quotation along with the alloy.
Can you keep threads and grounding points bare?
Yes. Masking is planned against the drawing before processing: threads, contact points and grounding areas are masked so they stay conductive and assembly-ready.
Which colors are available?
Natural, black and dyed colors are available, matched to your reference. Because aluminum takes color differently by alloy and process condition, share your color reference with the drawing so it is confirmed in writing before production.
How is coating thickness controlled?
Coating thickness is controlled per drawing specification. Since anodizing builds dimension on the part, thickness expectations are confirmed at quotation together with the alloy and coating class, so precision interfaces are agreed before processing.
What should I send for a quotation?
Share the drawing or 3D model with the alloy, coating class, color reference and masking requirements. Our team confirms the achievable result and provides a quotation and lead time for your review.
Is your quality system certified?
Production runs under an IATF 16949:2016 certified quality management system, covering the same facility where your parts are fabricated, anodized and inspected.
Request an Anodizing Quotation
Send your drawing or 3D model with alloy, coating class, color reference and masking requirements — we will confirm the achievable result, quotation and lead time for your review.
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