Many people still don't know what anodizing is.It is only known that anodizing is a surface treatment process commonly used in the processing of aluminum materials in CNC machining,such as CNC telescope processing and processing of some wearing articles.Why do CNC processing products use a treatment such as anodizing?Next,Xiaobian will explain it briefly for everyone.
First,the anodization of aluminum is generally carried out in an acidic electrolyte with aluminum as the anode.During the electrolysis process,anions of oxygen react with aluminum to form an oxide film.The film is not sufficiently fine at the initial formation,and although there is a certain resistance,the negative oxygen ions in the electrolyte can still reach the aluminum surface to continue to form an oxide film.As the film thickness increases,the electric resistance also becomes large,so that the electrolysis current becomes small.At this time,the outer oxide film in contact with the electrolytic solution is chemically dissolved.When the rate at which the surface of the aluminum forms oxide is gradually balanced with the rate of chemical dissolution,the oxide film can reach the maximum thickness under this electrolysis parameter.The anodized film of aluminum is porous in the outer layer,and it is easy to adsorb dyes and colored substances,so that it can be dyed and improved in decorativeness.After the oxide film is sealed by hot water,high-temperature steam or nickel salt,the corrosion resistance and wear resistance can be further improved.
To sum up,aluminum can improve the protection by anodizing.At the same time of anodizing,it also faintly covers the outer layer of the oxide film,so it can be dyed and added decorative.Anodizing is a multi-faceted performance improvement for aluminum products.