Process characteristics of micro-arc oxidation:

Micro-arc oxidation is a development from anodization, yet 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 flow of micro-arc oxidation 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 coating formed is far superior in both functionality and performance to anodized coatings. Depending on the material composition of the workpiece, the composition of the working liquid, the pulse waveform, and the process parameters, the ceramic layer on the surface after micro-arc oxidation offers a variety of functionalities and different application scopes, roughly 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、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. Reduced friction surface

Due to the micro-arc oxidation process, a ceramic layer with micro-pores forms on the material surface, reducing the coefficient of friction to between 0.06 and 0.12 when using traditional lubricants. Filling the micro-pores with solid lubricants further enhances the friction and wear reduction, making it suitable for applications such as car and motorcycle pistons, or any scenario requiring a low coefficient of friction.

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

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. Colored ceramic surfaces made of aluminum, magnesium, titanium, and their alloys can serve as high-end decorative materials for phone shells and the like.