Process characteristics of micro-arc oxidation:

Micro-arc oxidation evolved from anodizing, but it offers many advantages not present in traditional anodizing. The micro-arc oxidation equipment is simpler, the electrolyte is mostly alkaline, and it has minimal environmental impact. The temperature range of the solution can be quite broad. 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 resulting ceramic coating far exceeds anodized coatings in terms of functionality and performance. 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 offers various functionalities and different application ranges, roughly as follows:

1. High hardness, high strength

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. Wear-reduction Surface

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

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 enhancing the operating temperature of alloy components like aluminum, magnesium, and titanium. Suitable for instantaneous parts in rockets, cannons, and similar 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. They are 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 phone casings and the like.