Process Overview
Anodizing
Anodizing is an electrochemical process that converts the surface of aluminium into a durable, corrosion-resistant aluminium oxide layer. Unlike electroplating which deposits metal, anodizing grows an integral oxide layer into the aluminium surface. The porous structure can be dyed in a wide range of colours before sealing.
Coating Thickness
5–25 µm (decorative/clear) | 25–100 µm (hard anodizing)
Typical Turnaround
4–6 business days (standard)
Available Types
Types of Anodizing
Clear (Natural) Anodizing
Transparent oxide layer that preserves the natural silver-grey appearance of aluminium while significantly improving hardness and corrosion resistance. Most common choice for industrial and architectural aluminium.
Colour Anodizing
The anodic oxide is dyed in the desired colour before sealing. Wide range of colours available including black, gold, red, blue, and green. Used for consumer products, sporting goods, and architectural aluminium.
Hard Anodizing
Thicker oxide layer (25–100 µm) formed at low temperatures and high current density. Creates an extremely hard surface (400–500 HV) for engineering applications requiring wear resistance.
Why It Works
Key Advantages
- Integral surface treatment — will not peel or chip
- Significantly increased hardness and wear resistance
- Excellent corrosion resistance
- Wide colour range available
- Improved paint and adhesive adhesion
- Environmentally responsible (no heavy metals)
Where It's Used
Applications
- →Architectural aluminium panels and profiles
- →Consumer electronics enclosures
- →Automotive aluminium trim
- →Sporting goods and bicycle components
- →Medical devices and equipment
- →Industrial aluminium machinery parts
How We Do It
Our Process
Degreasing and etching
Brightening (optional)
Anodic oxidation in sulphuric acid bath
Dyeing (colour anodizing)
Sealing in hot deionised water or nickel acetate
Final inspection