Process characteristics of micro-arc oxidation:

Micro-arc oxidation evolved from anodizing but 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.

Properties and characteristics of micro-arc oxidation ceramic film:

Micro-arc oxidation surface treatment technology differs from anodizing surface oxidation technology, and the resulting ceramic coating far exceeds anodized coatings in terms of functionality and performance. Depending on the composition of the workpiece material, the composition of the working fluid, the pulse waveform, and process parameters, the ceramic layer formed after micro-arc oxidation boasts a variety of functions and different application scopes, generally as follows:

1. High hardness, high strength

Ceramic thin layers formed by micro-arc oxidation possess hardness and wear resistance exceeding淬火钢 and hard alloys, thus, they are suitable for manufacturing valve sleeves, cores, and cylinders for pneumatic and hydraulic servo valves in aerospace or aviation applications, as well as in lightweight products. On the surface of aluminum alloy spindle components in high-speed motion, ceramic layers generated by surface micro-arc oxidation can be applied.

2. Abrasion-Reduced Surface

Due to the micro-arc oxidation process, which forms a ceramic surface with micropores on the material, the friction coefficient can be reduced 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, aluminum alloys can withstand high temperatures of up to 800~900℃ and even 2000℃ in a short period, thus increasing the operating temperature of alloy components like aluminum, magnesium, and titanium. They are suitable for parts that require instantaneous performance, such as in rockets and cannons.

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. Colored ceramic surfaces made from aluminum, magnesium, titanium, and their alloys can be used as high-end decorative materials for mobile phone casings and the like.