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       Why Can't China Aluminum Die Casting Products Be Anodized
       By: weilong Date: June 16, 2020, 9:34 pm
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       Anodizing of aluminum is an electrolytic oxidation process in
       which the surfaces of aluminum and aluminum alloy are usually
       converted into an oxide film with protective, decorative and
       other functional properties. Starting from this definition, the
       anodization of aluminum includes only the part of the process of
       forming an anodized film. Anodizing and electroplating are not
       recommended for China Aluminum Die Casting Products
  HTML https://www.chinaweilong.cn/product/alumnium-die-casting/
       .
       Defects such as air streaks, cold insulation and sand holes are
       easily produced on the surface of aluminum die castings.
       The general anode is suggested to be aluminum extruded material,
       and the electroplating is changed to zinc aluminum alloy or zinc
       alloy. Metal or alloy parts are used as anodes, and oxide films
       are formed on their surfaces by electrolysis. The metal oxide
       film changes the surface state and properties, such as surface
       coloring, improving corrosion resistance, enhancing wear
       resistance and hardness, protecting metal surface, etc. For
       example, aluminum is anodized, aluminum and its alloys are
       placed in corresponding electrolyte (such as sulfuric acid,
       chromic acid, oxalic acid, etc.) as anodes, and electrolysis is
       carried out under specific conditions and under the action of
       applied current. Anode aluminum or its alloy is oxidized to form
       a thin layer of aluminum oxide on the surface with a thickness
       of 5-30 microns and a hard anodic oxide film of 25-150 microns.
       The anodized aluminum or its alloy improves its hardness and
       wear resistance, reaching 250-500kg/mm2, good heat resistance,
       hard anodized film melting point as high as 2320K, excellent
       insulation, breakdown voltage as high as 2000V, enhanced
       corrosion resistance, and no corrosion in Ω = 0.03 NaCl
       salt spray for thousands of hours.
       The oxide film thin layer has a large number of micropores, can
       absorb various lubricants, and is suitable for manufacturing
       engine cylinders or other wear-resistant parts; The membrane has
       strong micropore adsorption capacity and can be colored into
       various beautiful and gorgeous colors. Non-ferrous metals or
       their alloys (such as aluminum, magnesium and their alloys) 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.
       Want to know more about it, the Die Casting Manufacturer
  HTML https://www.chinaweilong.cn/
       will answer your questions.
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