Process characteristics of micro-arc oxidation:

Micro-arc oxidation evolved from anodizing but offers many advantages not found in traditional anodizing. 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.

Micro-arc oxidation ceramic film performance and characteristics:

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 offers a variety of functionalities and different application scopes, generally as follows:

1. High hardness, high layer

Ceramic thin layers formed through micro-arc oxidation have hardness and abrasion resistance exceeding淬火钢 and hard alloys. Therefore, in aerospace, aviation, or applications requiring lightweight products, aluminum alloys can be used to manufacture valve sleeves, valve cores, and cylinders for pneumatic and hydraulic servo valves. On the surface of aluminum alloy components subjected to high-speed movement, a ceramic layer generated by surface micro-arc oxidation can be applied.

2. Reduced Friction Surface

Due to the micro-arc oxidation process, a ceramic layer with micropores forms on the material surface, reducing 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 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°C, even 2000°C in short periods, thereby increasing the working temperature of alloy components such as aluminum, magnesium, and titanium. They are suitable for instantaneous parts in applications like rockets and cannons.

3. Light Absorption and Light Reflective Surface

Create ceramic layers with various performance and colors, such as black or white, which can absorb or reflect over 80% of light energy, suitable for solar heat collectors or heat sinks for electronic components. Aluminum, magnesium, titanium, and their alloys can be made into colorful ceramic coatings, serving as high-end decorative materials for phone casings, etc.