Explain:
Anodic oxidation refers to the electrochemical oxidation of metals or alloys. The process in which aluminum and its alloys form an oxide film on aluminum products (anode) under the action of an applied current under the corresponding electrolyte and specific process conditions.
This oxide film is protective and can improve the hardness, wear resistance and corrosion resistance of the metal.
Principle:
The aluminum and its alloys are placed in the corresponding electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as the anode. Under specific conditions and the action of the applied current, electrolysis is performed, and the aluminum or its alloy of the anode is oxidized, and a thin aluminum oxide is formed on the surface. layer, its thickness is 5 to 20 microns, and the hard anodized film can reach 60 to 200 microns. The anodized aluminum or its alloy improves its hardness and wear resistance, up to 250-500 kg/square millimeter. Good heat resistance, the melting point of hard anodized film is as high as 2320K. Excellent insulation, the breakdown voltage is as high as 2000V, and the corrosion resistance is enhanced. It will not corrode for thousands of hours in 0.03mol/L salt spray.
There are a large number of micropores in the thin oxide film layer. Metal particles or colored particles can be inhaled into the micropores by electrolysis, and then the micropores are closed by a water bath, so that the aluminum alloy has various colors. Using this method not only The strength of the aluminum alloy can be improved, and the colored particles sealed inside will not easily fade.
Anodic oxidation refers to the electrochemical oxidation of metals or alloys. The process in which aluminum and its alloys form an oxide film on aluminum products (anode) under the action of an applied current under the corresponding electrolyte and specific process conditions.
This oxide film is protective and can improve the hardness, wear resistance and corrosion resistance of the metal.
Principle:
The aluminum and its alloys are placed in the corresponding electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as the anode. Under specific conditions and the action of the applied current, electrolysis is performed, and the aluminum or its alloy of the anode is oxidized, and a thin aluminum oxide is formed on the surface. layer, its thickness is 5 to 20 microns, and the hard anodized film can reach 60 to 200 microns. The anodized aluminum or its alloy improves its hardness and wear resistance, up to 250-500 kg/square millimeter. Good heat resistance, the melting point of hard anodized film is as high as 2320K. Excellent insulation, the breakdown voltage is as high as 2000V, and the corrosion resistance is enhanced. It will not corrode for thousands of hours in 0.03mol/L salt spray.
There are a large number of micropores in the thin oxide film layer. Metal particles or colored particles can be inhaled into the micropores by electrolysis, and then the micropores are closed by a water bath, so that the aluminum alloy has various colors. Using this method not only The strength of the aluminum alloy can be improved, and the colored particles sealed inside will not easily fade.