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Machined parts ship in 3 days, order your metal & plastic parts today. Contact us now

Anodizing Services

We use different types of anodizing, such as Type II polar oxidation and Type III anodizing, which can be customized according to the requirements of the product.

Anodizing type II

All tolerances apply after anodizing

Project Info
Materials Aluminum
Colors Clear, black, you can define your color according to RAL.
Glossiness Glossy or matte
Texture Smooth, matte finish.
Thickness 0.00007” to 0.0010”
Surface roughness Ra 0.4μm to 1.2μin
Hardness 250-500 HV(The hardness range can be adjusted as needed)
Heat resistance 150°C(302°F)
Application Improve hardness, increase surface wear resistance, and enhance aesthetics

Anodizing type III

All tolerances apply after anodizing.

Project Info
Materials Aluminum
Colors Clear, Black
Glossiness Glossy or matte
Texture Smooth, matte finish.
Thickness 0.0005” to 0.0045”
Surface roughness Ra 0.5μm to 3.0μin
Hardness 450-600 HV(The hardness range can be adjusted as needed)
Heat resistance 200°C(392°F)
Application Used to improve the corrosion resistance, wear resistance, and appearance of metal parts

Example of anodizing parts

Hard anodized parts
Detail drawing of hard anodized parts

Design considerations for anodized parts

  • Increase the thickness of the part surface: Anodizing will form a layer of oxide on the surface of the metal part, which will increase the surface thickness. This may have an impact on the size and functionality of the parts, so it is recommended to block and cover threads, reams, or other critical surfaces before anodizing to ensure that their functionality is not affected.
  • Shelf marks: If the parts do not have holes, they may be hung on the conductive frame for anodizing treatment using spring clips, wire wrapping, or other methods. This may result in leaving small areas without oxidation treatment, known as “shelf marks”. If these areas have a significant impact on product performance, they need to be marked in the drawing to remind operators.
  • Conductivity: Anodizing will form an insulation layer, so the conductivity of the treated parts is poor. This needs to be considered in design and engineering to ensure that the electrical connections of the parts are not disturbed.
  • Rounding edges and corners: To prevent local overheating and burning caused by current concentration, all sharp corners on the workpiece should be rounded off. This can improve the uniformity and efficiency of the processing process.
  • Surface roughness: After hard anodizing treatment, the surface roughness may decrease, making the parts smoother. But if the workpiece already has a very smooth surface, it may lose some smoothness.
  • Special fixtures: Due to the high voltage and current required for hard anodizing, special fixtures must be designed to ensure good conductive contact of the workpiece. Otherwise, breakdown or burning of the contact part of the workpiece may occur, thereby affecting the treatment effect.

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