Process characteristics of micro-arc oxidation:

Micro-arc oxidation is a development from anodizing, but it has many advantages not possessed by anodizing in terms of technology. The micro-arc oxidation equipment is relatively simple, the electrolyte is mostly alkaline, and it has little environmental pollution. The temperature range of the solution can be quite broad. The process flow of micro-arc oxidation is simple and the treatment is versatile for materials.

Micro-arc oxidation ceramic film performance and characteristics:

Micro-arc oxidation surface treatment technology differs from anodic surface oxidation technology, and the ceramic coating formed is far superior in terms of function and performance compared to anodic oxidation coatings. Depending on the material composition of the workpiece, the composition of the working fluid, the pulse waveform, and the process parameters, the ceramic layer on the surface after micro-arc oxidation offers various 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、hard alloys. Therefore, in aerospace, aviation, or products requiring lightweight, aluminum alloys 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. Reduced-friction surface

Due to micro-arc oxidation, a ceramic layer with micro-pores forms on the material surface, reducing the friction coefficient to 0.06~0.12 when using traditional lubricants. Filling solid lubricants in the micro-pores further enhances the friction and wear reduction, suitable for automotive and motorcycle pistons or other applications requiring low friction coefficients.

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, thereby enhancing the operating temperature of aluminum, magnesium, titanium, and other alloy components. Suitable for rocket, cannon, and other parts requiring instantaneous performance.

3. Light Absorption and Light Reflective Surface

Create ceramic layers in various colors and performance levels, such as black or white, with over 80% light absorption or reflection capacity, suitable for solar heat collectors or heat sinks for electronic components. Colored ceramic coatings made of aluminum, magnesium, titanium, and their alloys can serve as high-end decorative materials for smartphone casings and the like.