Micro-arc oxidation，also known as surface ceramization, it is the development of anodizing technology. The principle is to generate plasma micro-arc sparks in the anode zone to increase the local temperature of the workpiece surface (anode zone) to above 2000 ℃, thereby cladding the anodic oxide On the surface of the workpiece, it is metallurgically combined with the base metal to form a tightly adhered dense ceramic oxide film. Its wear resistance, corrosion resistance, strength, hardness, and adhesion are much better than ordinary anodized oxide films.

Electrophoresis and micro-arc oxidation are two commonly used magnesium alloy surface treatment techniques.

Micro-arc oxidation technology is a green and emerging surface treatment technology. It is mainly used for surface treatment of light metals such as aluminum, magnesium and titanium and their alloys. It can effectively grow a uniform ceramic film on the surface of the base material.

The surface ceramic layer of the magnesium-based part after micro-arc oxidation treatment has high hardness, strong corrosion resistance, good insulation, strong bonding force between the film layer and the base metal, and the ceramic thickness is about 10 micrometers, so that the surface of the magnesium alloy is wear-resistant. , corrosion resistance, thermal shock resistance and insulation, etc.

This technology is currently a relatively advanced surface treatment technology for magnesium alloy materials in the world, and we have spent a lot of time and money research and development. Under normal circumstances, we will recommend customers to choose this surface treatment technology, compared to electrophoresis technology is more environmentally friendly, anti-oxidation effect is better.

After the micro-arc oxidation surface treatment technology, it will chemically react with the magnesium alloy material to form a protective film to prevent oxidation and corrosion of the product. This protective film penetrates into the magnesium alloy, and the thickness is generally 5~15μm. The magnesium alloy heat sink The thickness of itself does not change.

When different colors need to be sprayed, the thickness of the fin after dusting is usually increased by about 20 μm.