Process characteristics of micro-arc oxidation:

Micro-arc oxidation evolved from anodizing but offers many advantages not present in traditional anodizing processes. The micro-arc oxidation equipment is simpler, the electrolyte is mostly alkaline, and it has minimal environmental impact. The temperature range of the solution is wide. The process flow of micro-arc oxidation is simple and 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 both function and performance compared to anodic oxidation film. 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 boasts a variety of functions and different application ranges, generally as follows:

1. High hardness, high layer

Ceramic thin layers formed by micro-arc oxidation possess hardness and wear resistance exceeding淬火钢and hard alloys. Thus, in aerospace and aviation applications, or for products requiring light weight, aluminum alloys can be used to manufacture valve sleeves, cores, and cylinders for pneumatic and hydraulic servo valves. On the surface of aluminum alloy components in high-speed motion, ceramic layers generated by surface micro-arc oxidation can be applied.

2. Abrasion-resistant surface

Due to micro-arc oxidation, the surface of the material forms a ceramic layer with micropores, which can reduce the coefficient of friction to 0.06~0.12 when using traditional lubricants. Filling solid lubricants into the micropores further enhances the friction and wear reduction effects, making it suitable for applications such as car and motorcycle pistons or other scenarios requiring low friction coefficients.

Due to the ceramic coating on the surface, aluminum alloys can withstand high temperatures of up to 800~900℃ and even 2000℃ in a short period, thus enhancing the working temperature of aluminum, magnesium, titanium, and other alloy components. They are suitable for rocket and cannon parts requiring immediate operation.

3. Light Absorption and Light Reflective Surface

Create ceramic layers with varying 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 serve as high-end decorative materials for mobile phone shells and the like.