What are the advantages and disadvantages of aluminum sheet after anodized?
Metallic material in the electrolyte solution, so that the anode current is applied through the outer surface of the material to form a protective oxide film technology. Also known as the anodized surface. Metallic material or article surface after anodizing, corrosion resistance, hardness, wear resistance, insulation, heat resistance, etc. are greatly improved.
Anodized aluminum outer membrane porous, easily absorbed dyes and colored substances, which can be dyed to improve its decorative. An oxide film and then by hot water, steam or hot nickel salt blocking treatment can further improve the corrosion resistance and abrasion resistance. In addition to aluminum, anodized surface using metal alloys as well as magnesium, copper and copper alloys, zinc and zinc alloys, steel, cadmium, tantalum, zirconium and other industry.
At this time, the outer oxide layer in contact with the electrolyte dissolved chemically. When the speed of the surface of aluminum oxide and chemical dissolution speed gradually balance, that we can achieve the maximum thickness of the oxide film parameters of the electrolysis.
This film is the beginning of the formation of not thin enough, although some resistance, but the negative oxygen ions in the electrolyte can still continue to reach the surface of the aluminum oxide film is formed. As the film thickness increases, the resistance also becomes large, so that the electrolysis current decreases.
Anodizing process up to the implementation of a metal material is aluminum. The anodized aluminum is generally carried out in an acidic electrolyte, containing aluminum as an anode. In the electrolysis process, the role of oxygen anions and aluminum oxide film produced.
