Process characteristics of micro-arc oxidation:

Micro-arc oxidation is a development from anodizing, but it has many advantages not possessed by anodizing in the process. The micro-arc oxidation equipment is relatively simple, the electrolyte is mostly alkaline, and it has little environmental pollution. The temperature range of the solution can vary widely. The process flow of micro-arc oxidation is simple and versatile in material application.

Properties and characteristics of micro-arc oxidation ceramic film:

Micro-arc oxidation surface treatment technology differs from anodic surface oxidation technology, and the ceramic film formed is far superior in terms of functionality and performance compared to anodic oxidation films. Depending on the material composition of the workpiece, the composition of the working fluid, the pulse waveform, and the 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

The ceramic layer formed by micro-arc oxidation has a 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. The ceramic layer generated by surface micro-arc oxidation can be applied to the surface of aluminum alloy spindle components in high-speed motion.

2. Wear-Reducing Surface

Due to micro-arc oxidation, the material surface can form a ceramic layer with micro-pores, reducing 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, suitable for applications like automotive and motorcycle pistons, or any situation requiring a low coefficient of friction.

Due to the ceramic coating on the surface, aluminum alloy can withstand high temperatures of up to 800~900°C, even 2000°C in a short period, thereby increasing the operating temperature of aluminum, magnesium, titanium, and other alloy components. It is suitable for rocket, cannon, and other parts requiring instantaneous performance.

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 as high-end decorative materials for phone casings and the like.