Our Anodizing Surface Finishing Services
At CMS, we provide professional anodizing surface finishing services for a wide range of aluminum components used in industries such as automotive, aerospace, medical devices, electronics, and industrial equipment.
Our in-house anodizing line ensures consistent quality, high precision, and fast turnaround, making your parts not only durable but also visually appealing.
Through our advanced Type II and Type III anodizing processes, we can achieve various finishes—from decorative color anodizing to hard anodizing for enhanced wear resistance. Whether you need a protective coating, improved corrosion resistance, or custom-colored aluminum finishes, our team delivers precision results tailored to your exact requirements.
What Is Anodizing?
Anodizing is an electrochemical process that converts the metal surface of aluminum into a durable, corrosion-resistant, and aesthetically pleasing oxide layer. Unlike paint or plating, anodizing becomes an integral part of the metal, offering enhanced wear resistance and a long-lasting finish.
Our anodizing services are widely used in industries such as aerospace, automotive, electronics, and consumer products where surface performance and visual appeal matter most.
Types of Anodizing We Offer
We provide various anodizing finishes tailored to your application needs:
Type I – Chromic Acid Anodizing
Type I anodizing uses chromic acid as the electrolyte and produces the thinnest oxide layer (0.5–7.6 μm). It offers excellent corrosion resistance while causing minimal dimensional change to the part. The coating is grayish in color and has limited dyeing capability.
Type II – Sulfuric Acid Anodizing
Type II anodizing uses sulfuric acid as the electrolyte and produces coatings 5–25 μm thick. It is the most common and cost-effective anodizing process and allows for color dyeing in a wide range of finishes.
Type III – Hard Anodizing (Hardcoat)
Type III anodizing is performed under low-temperature and high-current conditions, forming a thick and dense oxide layer (25–150 μm). The coating is very hard (up to 400–600 HV) and dark in appearance.
Comparison Table
| Item | Type I | Type II | Type III |
|---|---|---|---|
| Electrolyte | Chromic acid | Sulfuric acid | Sulfuric acid (low temp, high current) |
| Coating Thickness | 0.5–7.6 μm | 5–25 μm | 25–150 μm |
| Hardness | Low | Medium | High |
| Dyeing Capability | Poor | Excellent | Moderate |
| Wear Resistance | Fair | Good | Excellent |
| Corrosion Resistance | Good | Good | Excellent |
| Dimensional Change | Minimal | Low | Noticeable |
| Typical Use | Aerospace precision parts | Decorative and general parts | Heavy-duty industrial parts |
Anodizing Color Options
We offer a wide range of anodizing color finishes to meet both functional and aesthetic requirements. Common colors include:
Clear (Natural Silver)
Matte or Glossy
Black
Matte or Satin
Gold
Glossy
Blue
Matte or Satin
Red
Glossy
Grey / Gunmetal
Matte
Note:
- Customized colors are also available upon request.
- Our color anodizing process ensures uniform color tone and excellent UV stability for outdoor applications.
Advantages of Anodizing
Anodizing offers multiple benefits that enhance both the performance and appearance of aluminum components. It is one of the most effective and durable surface finishing processes used across industries.
Materials for Anodizing
Anodizing is most commonly applied to aluminum and its alloys, creating a durable and decorative oxide coating that enhances corrosion resistance, surface hardness, and appearance. At CMS, we support a wide range of aluminum materials suitable for both Type II decorative anodizing and Type III hard anodizing.
Common Aluminum Alloys for Anodizing
| Material | Characteristics | Anodizing Performance | Typical Applications |
|---|---|---|---|
| Aluminum 6061 | Excellent machinability, strength, and surface finish. | Produces a bright, uniform anodized layer. | Structural parts, housings, enclosures. |
| Aluminum 6063 | Superior extrusion and decorative finish properties. | Ideal for clear or colored anodizing. | Frames, panels, and consumer products. |
| Aluminum 7075 | High strength and wear resistance. | Hard anodizing recommended due to alloy composition. | Aerospace and high-load mechanical parts. |
| Aluminum 5052 | Excellent corrosion resistance, medium strength. | Produces a smooth, matte anodized surface. | Marine and outdoor equipment. |
| Aluminum 2024 | High strength but lower corrosion resistance. | Requires special pretreatment for consistent finish. | Aerospace fittings and structural components. |
| Aluminum 1100 / 3003 | Pure aluminum grades with high corrosion resistance. | Provide bright, reflective anodized finish. | Decorative parts and reflectors. |
Applications
Anodizing is widely used across industries where both durability and appearance are critical.
At CMS, our advanced anodizing process enhances the surface performance of precision aluminum components used in aerospace, automotive, electronics, medical, and industrial sectors.
Our Anodized Parts Are Trusted In
✅ Aerospace & UAVs
✅ Automotive & E-Mobility
✅ Medical & Laboratory Equipment
✅ Consumer Electronics
✅ Robotics & Automation
✅ Industrial Machinery
Quality Assurance
At CMS, quality is not just a standard—it’s a commitment built into every step of our anodizing process. From pretreatment and oxidation to sealing and final inspection, each stage is carefully monitored to ensure stable color, consistent thickness, and excellent corrosion resistance.
We follow a strict quality management system certified under ISO 9001, IATF 16949, and ISO 13485, ensuring full traceability and process reliability for every batch of anodized parts we deliver.
Case Studies
Frequently Questions
If you have any questions in the process of product design and manufacturing, you can contact us to obtain expert support and provide the best solution for your product. Get support now ！
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Our engineering team will recommend the best anodizing solution for your parts based on material, function, and appearance requirements.
