Process characteristics of micro-arc oxidation:

Micro-arc oxidation evolved from anodizing but possesses 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 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 anodic surface oxidation, and the resulting ceramic coating also boasts more functions and superior performance compared to anodic oxidation coatings. Depending on the composition of the workpiece material, working fluid, pulse waveform, and process parameters, the ceramic layer formed by micro-arc oxidation after treatment exhibits various functions 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 quenched steel and hard alloys. Therefore, in aerospace, aviation, or products requiring lightweight, aluminum alloys 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. 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 car and motorcycle pistons, or any situation 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 aluminum, magnesium, titanium, and other alloy components. They are suitable for instantaneous parts in applications such as rockets and cannons.

3. Light Absorption and Light Reflective Surface

Create ceramic layers in various performance and colors, such as black or white, capable of absorbing or reflecting over 80% of light energy, suitable for solar heat absorbers or heat sinks for electronic components. Colored ceramic surfaces made of aluminum, magnesium, titanium, and their alloys can be used as high-end decorative materials for mobile phone shells.