Process characteristics of micro-arc oxidation:

Micro-arc oxidation, derived from anodic oxidation, offers numerous advantages not found in traditional anodic oxidation. The micro-arc oxidation equipment is simpler, the electrolyte is mostly alkaline, and it has minimal environmental impact. The solution temperature can vary over a wide range. The process of micro-arc oxidation is straightforward and versatile for materials.

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 liquid, the pulse waveform, and process parameters, the ceramic surface layer after micro-arc oxidation boasts various functions and different application scopes, generally as follows:

1. High hardness, high strength

The ceramic layer produced by micro-arc oxidation has a hardness and wear resistance that can exceed淬火钢 and hard alloys. Therefore, in aerospace, aviation, or applications requiring lightweight products, 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 subject to high-speed movement, the ceramic layer formed by surface micro-arc oxidation can be utilized.

2. Abrasion-Reduced Surface

Due to micro-arc oxidation, a ceramic layer with micro-pores can form on the material surface, reducing the coefficient of friction to between 0.06 and 0.12 when using traditional 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 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 temperatures 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 performance levels and colors, such as black or white, capable of absorbing or reflecting over 80% of light energy. They can be used as heat sinks for solar heat collectors or electronic components. Colored ceramic surfaces made of aluminum, magnesium, titanium, and their alloys can serve as high-end decorative materials for phone casings and similar applications.