Micro-arc oxidation process characteristics:

Micro-arc oxidation evolved from anodizing, but it offers many advantages not found in conventional 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 simpler and more versatile in material application.

Micro-arc oxidation ceramic film performance and characteristics:

Micro-arc oxidation surface treatment technology differs from anodic oxidation surface technology, and the ceramic coatings formed are far more functional and superior in performance compared to anodic oxide coatings. Depending on the composition of the workpiece material, the working fluid, pulse waveform, and process parameters, the ceramic surface layer obtained after micro-arc oxidation offers various functionalities and different application ranges, roughly as follows:

1. High hardness, high layer

The ceramic thin layer formed by micro-arc oxidation has a hardness and wear resistance that can exceed淬火钢、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. The ceramic layer generated by surface micro-arc oxidation can be applied to the surface of aluminum alloy spindle components in high-speed motion.

2. Wear-reducing Surface

Due to micro-arc oxidation, the surface of the material can form a ceramic layer with micropores, which can reduce the coefficient of friction 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 low friction coefficients.

Due to the ceramic coating on the surface, the aluminum alloy can withstand high temperatures of up to 800-900°C, even 2000°C in short periods, thereby enhancing the operating temperatures of alloy components like aluminum, magnesium, and titanium. It is suitable for parts that require instantaneous operation, such as rocket and cannon components.

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 be made into colorful ceramic surfaces, suitable as high-end decorative materials for phone casings and the like.