Process characteristics of micro-arc oxidation:

Micro-arc oxidation is derived from anodization, but it possesses many advantages not found in traditional anodization. The micro-arc oxidation equipment is simpler, the electrolyte is mostly alkaline, and it has a minimal impact on the environment. The solution temperature can vary over a wide range. The process of micro-arc oxidation is simpler and more 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 a variety of functionalities and different application scopes, generally as follows:

1. High hardness, high strength

Ceramic thin layers produced 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 alloys can be used to manufacture valve sleeves, cores, and cylinders for pneumatic and hydraulic servo valves. For the surface of aluminum alloy spindle components in high-speed motion, ceramic layers formed by surface micro-arc oxidation can be utilized.

2. Abrasion-resistant surface

Due to micro-arc oxidation, the surface of the material can form a ceramic layer with micro-pores, which can reduce the coefficient of friction to 0.06~0.12 when using traditional lubricants. Filling solid lubricants in the micro-pores further enhances the friction and wear reduction, making it suitable for applications such as car and motorcycle pistons or other scenarios requiring a low coefficient of friction.

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 applications requiring instantaneous parts, 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, suitable for solar heat absorbers or heat sinks for electronic components. Aluminum, magnesium, titanium, and their alloys can be used to create colorful ceramic surfaces, which can serve as high-end decorative materials for phone shells and similar applications.