The development direction of hard anode and aluminum alloy anodizing technology is to improve the oxidation speed and hardness. In order to improve the oxidation speed and comprehensive performance, eoe-88 series pulse power supply with pulse wave is recommended. The pulse components in its output voltage and current are rich, which is equivalent to 300 small pulse waves superimposed on the DC wave per second, and the film-forming speed is fast. For thick film oxidation, a "fast pulse" power supply with a frequency of 3-13.3hz can be used to give full play to the advantages of saving electricity and improving speed and hardness. This power supply has an oxide film of 12 μ The advantages are not obvious below M.

As a new type of anodizing technology, composite hard anodizing is made by adding magnetic powders such as Fe3O4, CrO2 and TiO2, superhard powders such as Al2O3, SiC and sin and conductive powders such as graphite (micron level) to sulfuric acid, oxalic acid and trisodium phosphate electrolyte respectively, so as to suspend them in the electrolyte for anodizing. The process has the advantages of easy operation, simple equipment and low cost. Compared with conventional anodic oxidation, its oxidation speed, upper limit of operating temperature and film performance are significantly improved.

To sum up, various anode treatment technologies will continue to improve in the next 10 years, but it is expected that many new anode treatment technologies will continue to appear in the future.