Micro-arc oxidation process characteristics:

Micro-arc oxidation is a development from anodizing, yet it boasts many advantages not found in traditional anodizing. The micro-arc oxidation equipment is simpler, the electrolyte is mostly alkaline, and it has minimal environmental impact. The solution temperature can vary over a wide range. The process of micro-arc oxidation is relatively simple and versatile for materials.

Properties and characteristics of micro-arc oxidation ceramic film:

Micro-arc oxidation surface treatment technology differs from anodizing surface oxidation technology, and the ceramic film formed is far superior in terms of functionality and performance to anodized films. Depending on the composition of the workpiece material, the composition of the working fluid, the pulse waveform, and the process parameters, the ceramic layer on the surface after micro-arc oxidation offers a variety of functions and different application scopes, generally as follows:

1. High hardness, high layer

Ceramic thin layers formed by micro-arc oxidation have hardness and wear resistance that can exceed淬火钢和hard alloys. Therefore, in aerospace, aviation, or applications requiring lightweight products, aluminum alloy can be used to manufacture valve sleeves, cores, and cylinders for pneumatic and hydraulic servo valves. On the surface of aluminum alloy spindle components in high-speed motion, ceramic layers generated by surface micro-arc oxidation can be applied.

2. Abrasion-reducing Surface

Due to micro-arc oxidation, a ceramic layer with micropores forms on the material surface, reducing the friction coefficient to 0.06~0.12 when using traditional lubricants. Filling solid lubricants in the micropores further enhances friction and wear reduction, making it suitable for applications such as automotive and motorcycle pistons, or any other scenarios requiring a low friction coefficient.

Due to the ceramic coating on the surface, aluminum alloys can withstand high temperatures of up to 800-900°C, even 2000°C in a short period, thus increasing the operating temperature for alloy components like aluminum, magnesium, and titanium. They are suitable for instantaneous parts in applications such as rockets and cannons.

3. Light Absorption and Light Reflective Surface

Create ceramic layers in various performance levels and colors, such as black or white, capable of absorbing or reflecting over 80% of light energy. These can be used for solar heat collectors or as heat sinks for electronic components. Aluminum, magnesium, titanium, and their alloys can be made into colorful ceramic surfaces, suitable for high-end decorative materials like smartphone casings.