Process characteristics of micro-arc oxidation:

Micro-arc oxidation is a development from anodizing, but it offers many advantages not found in anodizing, with a simpler process setup. The electrolyte is mostly alkaline, causing minimal environmental pollution. The solution temperature can vary over a wide range. 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 anodizing surface oxidation technology, and the ceramic coatings formed are far more functional and superior in performance compared to anodized coatings. 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 various functions and different application scopes, generally as follows:

1. High hardness, high strength

Ceramic thin layers formed through micro-arc oxidation possess hardness and wear resistance that can exceed hardened steel and hard alloys. Therefore, in aerospace, aviation, or applications requiring lightweight components, aluminum alloys can be used to manufacture valve sleeves, cores, and cylinders for pneumatic and hydraulic servo valves. On the surface of aluminum alloy spool components in high-speed motion, a ceramic layer generated through surface micro-arc oxidation can be utilized.

2. Reduced friction surface

Due to the micro-arc oxidation process, a ceramic layer with micropores forms on the material surface, which can reduce 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 other scenarios requiring a low friction coefficient.

Due to the ceramic coating on the surface, aluminum alloy can withstand high temperatures of up to 800~900℃ and even 2000℃ in a short period, thereby increasing the operating temperature of alloy components like aluminum, magnesium, and titanium. It is suitable for parts requiring instantaneous performance, such as in rockets and artillery.

3. Light Absorption and Light Reflective Surface

Create ceramic layers in various performance levels and colors, such as black or white, capable of absorbing or reflecting over 80% of light energy. They are suitable for solar heat absorbers or heat sinks for electronic components. Aluminum, magnesium, titanium, and their alloys can be used to produce colored ceramic surfaces, which can serve as high-end decorative materials for mobile phone casings.