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 minimal environmental impact. 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 anodic oxidation technology, and the ceramic film formed is far superior in functionality and performance compared to anodic oxidation film. Depending on the composition of the workpiece material, the working fluid, pulse waveform, and process parameters, the ceramic layer formed after micro-arc oxidation possesses various functionalities 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 (quenching 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. On the surface of aluminum alloy spindle components in high-speed motion, a ceramic layer generated by surface micro-arc oxidation can be utilized.

2. Reduced Friction Surface

Due to the micro-arc oxidation process, 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 the micro-pores further enhances the anti-friction and wear resistance, making it suitable for applications like car and motorcycle pistons, or any scenario requiring a low friction coefficient.

Due to the ceramic coating on the surface, aluminum alloys can withstand high temperatures of up to 800~900℃ and even 2000℃ in a short period, thus enhancing the operating temperature of 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 with varying performance 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. Colored ceramic surfaces made of aluminum, magnesium, titanium, and their alloys can serve as high-end decorative materials for cell phone casings.