Surface Finishing for Aluminum Part
Various Kind of Options Available
For aluminum alloy extrusion or CNC machining parts
We offer a range of surface treatments for aluminum parts, including anodizing, painting, sandblasting, electrophoresis, electroplating and more.
As Machined
Standard finish, surface roughness of 3.2 μm (126 μin), removes sharp edges and deburs parts cleanly.
Anodizing
Use electrolytic oxidation technology to enhance the corrosion resistance, oxidation resistance and color
Hard Anodizing
Enhanced hardness and wear resistance, providing stronger surface protection
Sandblasting
Treat a surface with sand or other particles to create a uniform rough texture
Powder Coating
Electrostatically applied powder creates an even, durable coating
Electrophoresis
Coating aluminum surface with electrophoretic coating, uniform and strong protective film
Electroplating
Electroplating metal coatings onto aluminum surfaces to enhance conductivity and aesthetics
Polishing
Improve gloss, remove surface irregularities, and create a smooth surface
Brushing
Creates a fine texture effect by brushing the surface, often used on metal materials
Laser Engraving
Use laser to etch the surface with high precision, often used for logos and patterns
Silk Screen Printing
Transfer the ink to the surface through the screen for pattern and text identification
Wood Grain Transfer
Thermal transfer technology transfers wood grain patterns to aluminum or plastic surfaces to simulate wood texture
Surface Finish workshop and equipment
Our surface treatment workshop is equipped with anodizing lines, powder spraying systems, polishing machines and sandblasting equipment, etc., which can provide high-quality and uniform surface treatment for aluminum parts.
Quality Control and Inspection
We use testing equipment to check the surface treatment effect according to the customer’s parameter requirements to ensure that the product meets the requirements.
All machined aluminum parts are measured using calipers, micrometers, and CMM to ensure tight dimensional tolerances.
We use profilometers to verify surface finish quality, ensuring smoothness meets drawing or functional requirements.
Each batch of aluminum is inspected with material reports and chemical analysis to confirm alloy grade and traceability.
Trained inspectors check for surface flaws, tool marks, and machining defects before packaging and final delivery.
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Frequently Asked Questions
Are you a manufacturer or a trading company?
We are an aluminum profile manufacturer. We provide extrusion, CNC machining and surface treatment services. You can view our company introduction video on Youtube:
How do you proceed with existing molds and new molds?
When we receive your project drawings or information, we will look for the same molds among our existing ones. We can give you free use without involving confidentiality agreements. You can check our aluminum radiator catalog to see if there are products that meet your project. When a new mold is needed, our engineering team will first communicate with you about possible suggestions for optimizing project costs.
Can I get a sample?
Yes, we are happy to provide you with samples so that you can check our production quality. The price of samples is free in most cases. Submit the form to contact our sales staff for detailed information.
How long does it take to get the sample?
If the sample is in stock, we can express it to you directly.
For customized heat sinks, extrusion production takes a little time, usually 20-30 days to complete.
If you open a new mold, how will you deal with the mold?
We will produce and preserve your molds according to your requirements, and provide mold maintenance and repair services for your subsequent use.
How much does an extrusion die cost?
For molds, 100% TT payment before production, for mass production orders, 30% TT payment before production, 70% TT payment after quality inspection before shipment.
Packaging
Packaging can be customized according to your needs. Options include using protective film or paper to separate and protect the surface, or foam film for additional surface protection. Products can be palletized or packed into cartons, and the quantity per pallet or carton can be specified by the customer.
The standard packaging involves bundling several pieces together with plastic wrap and then securing them onto pallets. Any packaging requirements beyond the standard will be accommodated, and the associated costs will be clearly provided to the customer.
Delivery Time
Mold production typically takes 7 days. After the sample is confirmed, producing a full container load of 26 tons generally requires 14 days for extrusion alone. If surface treatment is required, an additional 3 days will be needed. For machining, extra time will be required depending on the complexity and volume of the machining work. The exact additional time for machining will be determined based on the specific processing requirements.
Aluminum Surface Finishing: The Ultimate Guide
What types of surface treatments are there for aluminum?
Aluminum can undergo a wide variety of surface treatments to enhance its appearance, corrosion resistance, wear resistance, or functionality. Here’s a categorized overview of the main types of aluminum surface treatments:
Anodizing Treatments
Standard Anodizing: Forms a thin, durable oxide layer that improves corrosion resistance and allows for dye coloring.
Hard Anodizing (Hardcoat): Thicker, harder oxide layer for improved wear resistance, commonly used in industrial and aerospace applications.
Transparent (Clear) Anodizing: Natural silver appearance; protects while preserving the metallic look.
Mechanical Finishes
Polishing: Creates a mirror-like, smooth surface; improves aesthetic appeal.
Brushing: Produces a linear texture with a matte metallic look.
Sandblasting / Bead Blasting: Applies a uniform matte or satin finish by blasting abrasive particles.
Coating & Painting
Powder Coating: Durable, colorful coating applied electrostatically; excellent UV and weather resistance.
Liquid Painting: Spray-applied paint for color and surface protection.
Electrophoretic Coating (E-coating): Uniform, thin protective layer; often clear or tinted.
Coating & Painting
Powder Coating: Durable, colorful coating applied electrostatically; excellent UV and weather resistance.
Liquid Painting: Spray-applied paint for color and surface protection.
Electrophoretic Coating (E-coating): Uniform, thin protective layer; often clear or tinted.
Printing & Marking
Laser Engraving (Laser Marking): Permanent, high-precision marking used for logos, QR codes, serial numbers.
Silk Screen Printing: Applies colored inks to mark or decorate flat surfaces.
Pad Printing: Used for printing on irregular or curved surfaces.
Chemical Treatments
Chromate Conversion Coating (Alodine): Improves corrosion resistance and paint adhesion; available in trivalent or hexavalent chromium types.
Etching / Chemical Polishing: Removes surface imperfections; enhances appearance or prep for other treatments.
Decorative & Special Effects
Wood Grain Transfer Printing: Uses heat transfer film to simulate a wood finish on aluminum.
Color Dyeing (after anodizing): Adds color to anodized layers, offering visual variety.
Which industries are different surface types suitable for?
Different surface treatments for aluminum are widely used across various industries based on their functional and aesthetic requirements.
Anodizing, including standard, hard, and clear types, is commonly applied in architecture, electronics, aerospace, and automotive sectors due to its excellent corrosion resistance, wear resistance, and decorative finish.
Powder coating is favored in the construction, furniture, and consumer goods industries for its durability, UV resistance, and rich color options.
Brushing and polishing are often used in home appliances, consumer electronics, and decorative components to enhance surface texture and visual appeal.
Electrophoresis and electroplating are prevalent in automotive, hardware, and machinery parts for providing uniform protection, conductivity, and a smooth finish.
Laser engraving and silk screen printing are frequently used in branding, product labeling, and precision equipment.
Additionally, wood grain transfer printing is commonly found in architectural aluminum profiles, combining aesthetics with durability.
Each treatment adds value tailored to the demands of its respective application.
What are the costs of different types of surface treatments?
| Surface Treatment | Estimated Cost (USD/m²) | Notes / Cost Influencers |
|---|---|---|
| Standard Anodizing | $2 – $5 | Economical; color dyeing may add extra cost |
| Hard Anodizing | $5 – $10 | Higher cost due to thicker coating and longer processing |
| Transparent Anodizing | $3 – $6 | Similar to standard; clear finish, may be slightly more refined |
| Powder Coating | $6 – $12 | Depends on color, thickness, and complexity |
| Electrophoresis (E-coating) | $5 – $9 | Uniform, corrosion-resistant; often used with anodizing |
| Electroplating (Nickel, Chrome, etc.) | $8 – $20 | Cost depends heavily on metal type and thickness |
| Brushing | $2 – $4 | Mechanical finish; relatively low cost |
| Polishing | $3 – $6 | Mirror or gloss finish increases cost |
| Sandblasting / Bead Blasting | $2 – $5 | Preparation step; cost varies by grit and finish quality |
| Laser Engraving | $0.05 – $0.20 per cm² | Precision-driven; cost based on complexity and area |
| Silk Screen Printing | $0.50 – $2 per piece | Setup cost can be high for small batches |
| Wood Grain Transfer Printing | $8 – $15 | Decorative; cost depends on pattern complexity and finish |
Note: Prices are indicative for medium-scale industrial orders. Custom work, low volumes, or specialty finishes can increase costs significantly.