Process characteristics of micro-arc oxidation:

Micro-arc oxidation evolved from anodizing but offers 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 solution temperature can vary over a wide range. The process of micro-arc oxidation is straightforward and versatile for various materials.

Properties and characteristics of micro-arc oxidation ceramic film:

Micro-arc oxidation surface treatment technology differs from anodic oxidation technology, and the ceramic film formed is far superior in both functionality and performance to anodic oxidation films. 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 exhibits a variety of 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 quenched steel and hard alloy, thus, in aerospace, aviation, or applications requiring lightweight products, aluminum alloys can be used to manufacture valve sleeves, valve cores, and cylinders for pneumatic and hydraulic servo valves. The ceramic layer generated by surface micro-arc oxidation can be used on the surface of aluminum alloy spindle components in high-speed motion.

2. Abrasion-resistant surface

After micro-arc oxidation, a ceramic surface with micro-pores is formed on the material, which can reduce the coefficient of friction to 0.06~0.12 when using traditional lubricants. Filling solid lubricants in the micro-pores can further reduce friction and wear, making it suitable for applications like car and motorcycle pistons, or other scenarios 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℃ and even 2000℃ in a short period, thus increasing the operating temperature of alloy components like aluminum, magnesium, and titanium. They are suitable for use in parts that require instantaneous operation, such as rockets and cannons.

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. They are suitable for solar heat absorbers or heat sinks for electronic components. Aluminum, magnesium, titanium, and their alloys can form colorful ceramic coatings, serving as high-end decorative materials for items like phone casings.