Magnesium Surface Treatment Surface Treatment Technology of Magnesium Alloy Micro-arc Oxidation MAO

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

Magnesium alloy micro-arc oxidation surface treatment is a new technology for in-situ growth of oxide ceramics on the surface of non-ferrous metals. The use of micro-arc oxidation technology for surface ceramization of magnesium and its alloy materials has the advantages of simple process, small footprint, strong process capacity, high production efficiency, and suitable for batch industrial production.

Magnesium alloy micro-arc oxidation electrolyte does not contain toxic substances and heavy metal elements, and the electrolyte (environmental protection type) has strong anti-pollution ability and high regeneration and reuse rate, so it has little environmental pollution and meets the needs of environmental protection and clean production; it can be obtained by changing the process parameters. Different characteristics of the oxide film layer to meet the needs of different purposes; it is also possible to change or adjust the composition of the electrolyte to make the film have a certain characteristic or present different colors; it is also possible to use different electrolytes to perform multiple microscopy on the same workpiece. Arc oxidation treatment to obtain a ceramic oxide film with multiple different properties.

The ceramic film on the surface of magnesium-based parts after micro-arc oxidation treatment has high hardness (HV 300-1000), strong corrosion resistance (CASS salt spray test>480h), good insulation (film resistance>100MΩ), film layer and substrate The metal bonding force is strong, and the ceramic thickness is about 10 microns, which greatly improves the wear resistance, corrosion resistance, thermal shock resistance and insulation properties of the magnesium alloy surface. Moreover, the ceramic layer on the surface is relatively dense, the porosity is extremely low, and it has high corrosion resistance. The salt spray corrosion performance is increased by 5-10 times, which comprehensively solves the problem of practical applications and provides technical support for the development and application of magnesium alloys. .

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