Process characteristics of micro-arc oxidation:
Micro-arc oxidation, developed from anodizing, boasts numerous advantages not found in traditional anodizing. The micro-arc oxidation setup is simpler, and the electrolyte is mostly alkaline, resulting in minimal environmental pollution. The temperature range of the solution can be quite broad. The process flow of micro-arc oxidation is straightforward and 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 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 grade
The ceramic 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 the micro-arc oxidation process, a ceramic layer with micropores forms on the material surface, which can reduce the coefficient of friction to between 0.06 and 0.12 when using traditional lubricants. Filling solid lubricants in the micropores further enhances the anti-friction and wear resistance, making it suitable for applications such as car and motorcycle pistons, or any scenario 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 increasing the operating temperature of aluminum, magnesium, titanium, and other alloy components. They are suitable for rocket, cannon, and other parts requiring instantaneous 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 collectors or heat sinks for electronic components. Aluminum, magnesium, titanium, and their alloys can be used to produce colored ceramic surfaces, which can serve as high-end decorative materials for phone shells and the like.
