Aluminum Sheet Metal Anodized CNC Machining Color Parts
We offer anodizing type II and III, which are ideal surface finishes for aluminum parts.
Anodizing strengthens aluminum parts and is available in several colors, depending on the type.
All types of anodizing will increase the lead time and cost per part.
Anodizing type II
| Surface preparation | Colors | Glossiness | Cosmetic availability | Thickness | Visual appearance |
|---|---|---|---|---|---|
| As machined (Ra 3.2μm / Ra 126μin) | Clear, Black, Red, Blue, Orange, Gold | Glossy (Above 20 GU) | No | 50μm to 150μm | Parts are anodized directly after machining. Machining marks will be visible. |
| Bead blasted | Clear, Black, Red, Blue, Orange, Gold | Matte (Below 10 GU) | Cosmetic on request | for clear: 8 to 12μm(0.0003” to 0.0004”) black and color: 12 to 16μm(0.0004” to 0.0006”) | Grainy texture, matte finish |
| Bead blasted | Clear, Black, Red, Blue, Orange, Gold | Glossy (Above 20 GU) | Cosmetic on request | for clear: 8 to 12μm(0.0003” to 0.0004”) black and color: 12 to 16μm(0.0004” to 0.0006”) | Grainy texture, glossy finish |
| Brushing(Ra 1.2μm / Ra 47μin) | Clear, Black, Red, Blue, Orange, Gold | Glossy (Above 20 GU) | Cosmetic on request | for clear: 8 to 12μm(0.0003” to 0.0004”) black and color: 12 to 16μm(0.0004” to 0.0006”) | Parts are manually brushed to reduce marks, then anodized. Brushing lines will be visible |
Anodizing type III
| Surface preparation | Colors | Cosmetic availability | Thickness | Visual appearance |
|---|---|---|---|---|
| As machined (Ra 3.2μm / Ra 126μin) | Black, Natural (thicker layers will appear darker) | No | 35 to 50μm(0.0013” to 0.0019”) | Parts are anodized directly after machining. Machining marks will be visible. |
What is Anodize for CNC Machined Metal Parts ?
Anodizing is a common surface treatment method for CNC machining metal parts, especially aluminum.
This is an electrochemical process that forms a controlled oxide layer on metal surfaces. Anodizing has several advantages, including enhanced corrosion resistance, improved wear resistance, increased surface hardness, and the ability to add color or dye to the metal.
Anodizing can produce a variety of surface finishes, including natural silver (clear anodizing), and various colored finishes achieved by dyeing the anodized layer. Color can be absorbed into the porous oxide layer, providing an aesthetic option for CNC machined parts.
The anodizing process adds a layer rather than a coating to the surface of the metal, meaning the treatment doesn’t significantly alter the dimensions of the part. This makes anodizing a popular choice for CNC machined parts that need to be held to tight tolerances.
In which industries is anodizing surface treatment applied?
Anodizing is commonly used in a variety of industries, including aerospace, automotive, and construction. Its benefits include increased durability and corrosion resistance, improved aesthetic appeal, and the ability to add color without the use of paints or coatings.
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