Process characteristics of micro-arc oxidation:

Micro-arc oxidation, derived from anodizing, boasts numerous advantages not present in traditional anodizing. The micro-arc oxidation equipment is simpler, the electrolyte is mostly alkaline, and it has a minimal environmental impact. The temperature range of the solution can vary widely. The process of micro-arc oxidation is relatively straightforward and has a broad applicability to materials.

Properties and characteristics of micro-arc oxidation ceramic film:

Micro-arc oxidation surface treatment technology differs from anodic oxidation, and the resulting ceramic coatings far exceed the anodic oxidation films in terms of functionality and performance. Depending on the composition of the workpiece material, working fluid, pulse waveform, and process parameters, the ceramic layer formed after micro-arc oxidation possesses 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 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 components in high-speed motion.

2. Abrasion-Reduced Surface

Due to micro-arc oxidation, the material surface forms a ceramic layer with micro-pores, reducing the friction coefficient to 0.06~0.12 when using traditional lubricants. Filling solid lubricants in the micro-pores further enhances the anti-friction and wear resistance, making it suitable for applications like 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 a short period, thus enhancing the operating temperature of alloy components like aluminum, magnesium, and titanium. They are suitable for instantaneous parts in rockets, cannons, and other applications.

3. Light Absorption and Light Reflective Surface

Create ceramic layers in various colors and performance levels, such as black or white, with light absorption or reflection rates exceeding 80%, 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 smartphone casings.