What Is The Corrosion Resistance Of Aluminum After Anodizing
Nov 25, 2022
After the anodic oxidation process, the corrosion resistance of aluminum will be greatly improved.
The so-called anodic oxidation refers to the aluminum plate placed in the corresponding electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as the anode, under specific conditions and external current action, electrolysis. Through the anodic oxidation process, a dense alumina film is formed on the surface of the aluminum plate, which plays the role of air isolation. Metal corrosion is actually the process of metal oxidation by the central enterprises in the air. Now the existence of this layer of dense alumina film plays the role of isolating oxygen, which also improves the corrosion resistance of the metal. In addition, the anodic oxidation process can also improve the hardness and wear resistance. Anodizing process of aluminum is widely used in mechanical parts, aircraft and automobile parts, precision instruments and other fields.
In addition, the thin layer of oxide film has a large number of micro holes, can absorb various lubricants, suitable for the manufacture of engine cylinder or other wear-resistant parts; Membrane microporous adsorption ability is strong, can absorb pigments, coloring into a variety of beautiful gorgeous colors. Many colorful phone cases, such as champagne gold, use an anodic oxidation process to treat the metal and then adsorb the corresponding pigment.
