Micro-arc oxidation process characteristics:

Micro-arc oxidation is derived from anodization, but it possesses many advantages not found in conventional anodization. The micro-arc oxidation equipment is simpler, and the electrolyte is mostly alkaline, causing minimal environmental pollution. The temperature range of the solution is broad. The process of micro-arc oxidation is simpler and more 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 film formed is far more functional and superior in performance compared to anodized 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 offers a variety of functions and different application scopes, generally as follows:

1. High hardness, high layer

Ceramic thin layers formed by micro-arc oxidation have 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 spindle components in high-speed motion.

2. Abrasion-resistant surface

Due to the micro-arc oxidation process, a ceramic layer with micropores forms on the material surface, reducing 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 scenario requiring a low friction coefficient.

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 a short period, thereby enhancing the operating temperature of aluminum, magnesium, and titanium alloy components. It is suitable for rocket, cannon, and other parts requiring instantaneous performance.

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. These can be used as heat sinks for solar thermal collectors or electronic components. Colored ceramic surfaces made of aluminum, magnesium, titanium, and their alloys can serve as high-end decorative materials for phone shells and more.