Process characteristics of micro-arc oxidation:

Micro-arc oxidation is derived from anodizing, yet it possesses numerous advantages not found in anodizing processes. The micro-arc oxidation equipment is relatively simple, with most electrolytes being alkaline, resulting in minimal environmental pollution. The temperature range of the solution can vary widely. The micro-arc oxidation process is straightforward and versatile in material application.

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 compared to anodized films. Depending on the material composition of the workpiece, the composition of the working fluid, the pulse waveform, and process parameters, the ceramic layer on the surface after micro-arc oxidation exhibits various functionalities and different application scopes, generally as follows:

1. High hardness, high strength

Ceramic thin layers formed by micro-arc oxidation have hardness and wear resistance that can exceed quenched steel and 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 components subjected to high-speed movement, a ceramic layer generated by surface micro-arc oxidation can be utilized.

2. Wear-resistant Surface

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

Due to the ceramic coating on the surface, aluminum alloys can withstand high temperatures of 800~900℃ and even 2000℃ in a short period of time, thus enhancing the operating temperature of aluminum, magnesium, titanium, and other alloy components. They are suitable for components requiring instantaneous operation, 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 formed into colorful ceramic coatings, suitable for high-end decorative materials like phone casings.