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 range is 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 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 offers a variety of 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 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. On the surface of aluminum alloy spindle components in high-speed motion, ceramic layers generated by surface micro-arc oxidation can be applied.

2. Abrasion-resistant 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 automotive and motorcycle pistons, or any situation requiring a low friction coefficient.

Due to the ceramic coating on the surface, the aluminum alloy can withstand high temperatures of up to 800-900°C, even 2000°C in a short period, thereby increasing the working temperature of alloy components like aluminum, magnesium, and titanium. It is suitable for components that require instantaneous performance, such as rocket and cannon parts.

3. Light Absorption and Light Reflective Surface

Create ceramic layers in various colors and performance levels, such as black or white, with energy absorption or reflection rates over 80% for use in solar heat collectors or heat sinks for electronic components. Aluminum, magnesium, titanium, and their alloys can be made into colored ceramic surfaces suitable for high-end decorative materials like phone casings.