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Aluminum Anodizing Services

Xmake offers Type II and Type III aluminum anodizing services for CNC machined parts, sheet metal parts, and extruded profiles. Available in black, clear, custom colors, with no minimum order and lead times as fast as 5 days.

ISO 9001 CertifiedQuality you can trust
No Minimum OrderFlexible for any project
One-Stop CNC + FinishingEnd to end
We can sign a confidentiality agreement if needed.

Anodizing Specifications

Anodizing example part

Function

Corrosion & wear protectionDecorative color finishElectrical insulation

Applicable Materials

Aluminum alloys (6061, 7075, 5052, 2024, etc.)

Coating Thickness

Type II: 5–25 μmType III: 25–75 μm

Dimensional Change

+5–75 μm per surface

Color Options

BlackClearRedBlueGoldGreenCustom colors

Surface Hardness

Type II: 200–400 HVType III: 400–600 HV

What Is Anodizing

Precision anodized aluminum sample

Anodizing is an electrochemical surface treatment process used to improve the corrosion resistance, surface hardness, and wear resistance of aluminum while also enhancing the overall appearance of the part. The process works by immersing aluminum parts in an electrolyte solution and applying a controlled electric current, causing the aluminum to oxidize and form a porous oxide layer on the surface.

This porous structure gives anodizing two major advantages. Before sealing, the oxide layer can absorb dyes to create long-lasting black, gold, blue, and other color finishes. After sealing, it forms a dense protective barrier that further improves corrosion resistance, wear resistance, and surface hardness.

Unlike paint or powder coating that simply sits on top of the metal surface, the anodized layer grows directly from the aluminum substrate itself and becomes part of the material structure. As a result, anodizing offers superior adhesion, durability, and excellent resistance to peeling or chipping.

Anodizing is widely used for aluminum alloys such as 6061, 6063, 7075, and 5052. Because different alloys contain different compositions, they may produce variations in color consistency, surface texture, and final appearance after anodizing.

Types Of Anodizing

Xmake offers two anodizing processes, Type II and Type III, tailored to meet distinct requirements: decorative protection and high-strength wear resistance, respectively. The choice between these two types depends on whether your parts prioritize aesthetic appearance or mechanical durability in their actual application.

Type II anodized aluminum part

Type II Anodizing

Type II Anodizing (sulfuric acid anodizing) is mainly used to improve the corrosion resistance and decorative appearance of aluminum parts. It offers excellent dyeability, lower cost, and a smoother surface finish compared to Type III, but provides lower hardness and wear resistance.

Type III hard anodized aluminum part

Type III Anodizing

Type III Anodizing (hard anodizing) forms a thicker and denser oxide layer with significantly higher surface hardness, wear resistance, and corrosion resistance. In some cases, its hardness can approach that of tool steel. However, it has higher cost, rougher surface texture, and weaker dyeability compared to Type II.

Type II VS Type III

CharacteristicType II AnodizingType III Anodizing
Corrosion ResistanceGoodExcellent
Wear ResistanceModerateExcellent
Coating Thickness5–25 μm25–75 μm
Hardness200–400 HV400–600 HV
AppearanceGlossy / Matte · Wide color optionsDark gray to black · Durable matte finish
DyeabilityFull color rangeLimited to darker tones
Typical ApplicationsConsumer electronics · CNC cosmetic parts · Decorative componentsAerospace parts · Industrial wear parts

Tips: If your part mainly requires wear resistance and durability, choose Type III anodizing. If corrosion resistance and decorative coloring are the priority, Type II is usually the better option.

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Anodizing Color Options

For custom RAL or Pantone color requirements, please contact your sales engineer or email us for assistance.

Anodizing Finish Gallery

Before and after comparison of our anodizing work on real parts.

6061 Aluminum texture
6061 Aluminum part
Type III Anodize
Finish
Dark Gray
Effect
6061 Aluminum
Material
6063 Aluminum texture
6063 Aluminum part
Type II Anodize
Finish
Metallic Silver
Effect
6063 Aluminum
Material
6061 Aluminum texture
6061 Aluminum part
Type II Anodize
Finish
Dyed Finish
Effect
6061 Aluminum
Material
5052 Aluminum texture
5052 Aluminum part
Type II Anodize
Finish
Matte Black
Effect
5052 Aluminum
Material
6061 Aluminum texture
6061 Aluminum part
Type II Anodize
Finish
Dyed Finish
Effect
6061 Aluminum
Material
2024 Aluminum texture
2024 Aluminum part
Type III Anodize
Finish
Hard Coat
Effect
2024 Aluminum
Material

Why Choose Xmake For Anodizing

Xmake integrates anodizing with CNC machining, sandblasting, and other finishing processes in one streamlined workflow, delivering three key advantages:

01

Consistent Anodizing Quality

Surface preparation, alloy selection, and anodizing parameters are controlled throughout the entire process to ensure stable color consistency, coating quality, and surface appearance.

02

Faster Production Turnaround

Parts move directly from machining and pre-treatment to anodizing without external supplier delays, reducing lead times and minimizing handling risks.

03

Reliable Manufacturing Capacity

400+ CNC machines with integrated finishing capabilities, managed under ISO 9001 and ISO 13485 standards.

View Our Factory
Factory process overview
Finished component detail
Production parts batch

400+

CNC Machines

ISO 9001

Quality System

27+

Years Experience

100%

Quality Inspection

Frequently Asked Questions

Have more questions? Our engineering team is ready to help you find the right anodizing solution.

Ready to Get Your Parts Anodized

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Shenzhen

Building A, Jinsheng Finance Building, No. 217 Nanhuan Road, Bao'an District.

Hong Kong

MAKE DIRECT HOLDINGS LIMITED Unit 1111, 11/F, Hollywood Plaza, 610 Nathan Road, Mong Kok, Kowloon, Hong Kong