Anodic Oxidation, Definition Of Current Efficiency

Anodic oxidation

Definition: electrochemical oxidation of metals or alloys

Principle: The metal or alloy parts as the anode, using the method of electrolysis to form oxide film on its surface. Metal oxide film changes the surface state and performance, such as surface coloring, improve corrosion resistance, enhance wear resistance and hardness, protect the metal surface and so on. For example, aluminum anodizing, aluminum and its alloy placed in the corresponding electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as the anode, under specific conditions and external current, electrolytic. Anodic aluminum or its alloy oxidized, forming a thin layer of alumina on the surface, its thickness is 5 ~ 20 microns, hard anodic oxide film can reach 60 ~ 200 microns. Anodized aluminum or its alloy, improve its hardness and wear resistance, up to 250 ~ 500 kg/square mm, good heat resistance, hard anodized film melting point up to 2320K, excellent insulation, breakdown resistance voltage up to 2000V, enhance the corrosion resistance. In ω = 0.03NaCl salt spray after thousands of hours without corrosion. 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; The membrane has strong adsorption capacity and can be colored into a variety of beautiful and gorgeous colors. Non-ferrous metals or their alloys (such as aluminum, magnesium and their alloys, etc.) can be anodized. This method is widely used in mechanical parts, aircraft and automobile parts, precision instruments and radio equipment, daily necessities and architectural decoration.

If you have any questions, please contact us. Our company can produce various customized needles, medical needles, puncture needles, hypodermic needles, biopsy needles, vaccine needles, injection needles, syringe needles, veterinary needles, pencil point needle, ovum pick up needles, spinal needles, etc. If you need customized needle products, please contact us. We look forward to your inquiry! The quality of the products manufactured in our factory will surely satisfy you!

Please contact us if you need: zhang@sz-manners.com