17Flow of work

After hard anodizing processing, the surface can get a thick oxide film with high hardness, the oxide film can reach 25 to 100 microns, if there is a special need, it can reach 200 microns, the hardness of the aluminum film varies according to the material composition, the max hardness can reach about HV650. The pure aluminum film has the highest hardness and does not corrode in the salt spray test for several thousand hours.