Process characteristics of micro-arc oxidation:

Micro-arc oxidation evolved from anodization but possesses many advantages not found in traditional anodization. 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 anodizing surface oxidation technology, and the resulting ceramic coating also offers more functions and superior performance compared to anodized coatings. Depending on the composition of the workpiece material, working fluid, pulse waveform, and process parameters, the ceramic layer formed after micro-arc oxidation possesses a variety of functions and different application ranges, generally as follows:

1. High hardness, high layer

The ceramic layer formed 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 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 components in high-speed motion.

2. Abrasion-resistant surface

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

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 increasing the working temperature of alloy components like aluminum, magnesium, and titanium. They are suitable for use in rocket and cannon parts that require immediate performance.

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