Process characteristics of micro-arc oxidation:

Micro-arc oxidation is a development from anodizing, but it offers many advantages not present in 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 vary widely. The process flow 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 ceramic coating formed is far superior in terms of functionality and performance compared to anodized coatings. 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 scopes, generally as follows:

1. High hardness, high grade

Ceramic thin films produced by micro-arc oxidation have hardness and abrasion resistance that can exceed hardened steel and hard alloys. Therefore, in aerospace, aviation, or products requiring light weight, 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-reducing surface

Due to micro-arc oxidation, a ceramic layer with micropores forms on the material surface, reducing the coefficient of friction 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 coefficient of friction.

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, thereby enhancing the operating temperature of alloy components like aluminum, magnesium, and titanium. They are suitable for applications requiring instantaneous parts, such as rockets and cannons.

3. Light Absorption and Light Reflective Surface

Create ceramic layers in various colors and performance levels, such as black or white, with >80% light absorption or reflection capabilities, 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 mobile phone shells.