Micro-arc oxidation process characteristics:

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 anodizing surface oxidation technology, and the ceramic coatings formed are far more functional and superior in performance compared to anodized coatings. Depending on the composition of the workpiece material, the working fluid, pulse waveform, and process parameters, the ceramic surface layer after micro-arc oxidation exhibits various functions and different application scopes, generally as follows:

1. High hardness, high layer

Ceramic thin layers produced by micro-arc oxidation have hardness and wear resistance that can exceed淬火钢 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. On the surface of aluminum alloy spindle components in high-speed motion, ceramic layers formed by surface micro-arc oxidation can be applied.

2. Abrasion-resistant surface

Due to the micro-arc oxidation process, the material surface forms a ceramic layer with micro-pores, reducing the coefficient of friction to 0.06~0.12 when using conventional lubricants. Filling solid lubricants in the micro-pores further enhances the friction and wear reduction, making it suitable for applications like car and motorcycle pistons or any situation requiring a low coefficient of friction.

Due to the ceramic coating on its surface, the aluminum alloy can withstand high temperatures of up to 800~900°C, even 2000°C in short periods, thus enhancing the working temperature of alloy components such as aluminum, magnesium, and titanium. It is suitable for components requiring immediate action, such as rocket and cannon parts.

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. These can be used for solar heat absorbers or heat sinks for electronic components. Aluminum, magnesium, titanium, and their alloys can form colorful ceramic surfaces, suitable as high-end decorative materials for mobile phone casings and the like.