1: Alloy materials and surface structure
Micro-arc oxidation treatment of industrial aluminum profile alloy composition requirements are not high, some copper or silicon content of high cast aluminum alloy, using anodic oxidation way can not be treated, using micro-arc oxidation method can be treated; The surface structure is not very high, generally do not need to be polished, for rough surface, after micro-arc oxidation can achieve a more smooth and smooth effect.
2: Composition of electrolyte solution
Electrolyte solution of micro-arc oxidation is generally composed of metal or non-metal oxide alkaline salt solution, including silicate, phosphate, etc. In order to obtain high-quality ceramic film, the composition of electrolyte solution must be controlled well. The pH of the electrolyte solution is to be kept in the range of 9-13, according to the nature of the membrane layer, decide whether to need to add the organic or inorganic additives, in the case of constant voltage, the greater the concentration of solution, the more rapidly the film-forming, the slower the temperature rise, the lower the concentration of the solution, film forming speed slower, the temperature will rise quickly, So the electrolyte solution determines the quality of the film.
3: Electrolyte temperature
The micro-arc oxidation electrolyte temperature control in the range of 20 to 60 ℃, and its permitted range is bigger, can be between 10-90 ℃, the higher the temperature, film forming the faster, the faster the volatilization of the electrolyte at the same time, the surface roughness is higher, micro-arc oxidation is an exothermic process, which requires a refrigeration equipment, on the surface of industrial aluminum will escape of gas, Air compression device should be installed to fully stir the tank liquid, so that the oxidation temperature is uniform.
