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      Zinc

      Zinc is a chemical element whose chemical symbol is Zn, and its atomic number is 30.

      Chemical composition:
      Zn

      Product introduction

      (I) Galvanizing
          Zinc has excellent atmospheric corrosion resistance, so it is mainly used in steel and steel structure surface coating (such as galvanized sheet). It widely used in automotive, construction, shipping, light industry and other industries. In recent years, western countries have begun to try to directly use zinc alloy plate as roof covering material. Its service life can be as long as 120-140 years, and it can be recycled, while the service life of galvanized iron plate as roof material is generally 5 to 10 years.

      (Ⅱ) manufacture of copper alloy materials (such as brass)
          It used in automobile manufacturing and machinery industry. Zinc has suitable mechanical properties. The strength and hardness of zinc are not high, but with the addition of aluminum, copper and other alloy elements, its strength and hardness are greatly improved.  Especially with the emergence of zinc-copper-titanium alloy, its comprehensive mechanical properties have approached or reached the level of aluminum alloy, brass and gray cast iron. Its creep resistance has also been greatly improved. Therefore, zinc-copper-titanium alloy has been widely used in hardware production.

      (Ⅲ) Zinc alloy used in casting
          It mainly is die castings, which used in automotive, light industry and other industries. Most Zinc Alloys have excellent processing properties, and the pass processing rate can reach 60% to 80%. The medium voltage performance is superior, it can carry on the deep drawing, and it has the self-lubricity, prolongs the die life. It can be welded by brazing or resistance welding or arc welding (need to be in Helium), the surface can be electroplated and painted, and the cutting performance is good. It has superior superplastic properties under certain conditions. In addition, zinc has good resistance to electromagnetic field. The conductivity of zinc is 29% of that of standard electrical copper. In the case of radio frequency interference, zinc plate is a very effective shielding material. At the same time, as zinc is non-magnetic, it is suitable for making instrument parts, instrument shells and coins. At the same time, Zinc itself will not produce sparks with other metals, it suitable for underground explosion-proof equipment.

      (IV)It used in the manufacture of zinc oxide, accounting for about 11%.
          It widely used in rubber, coatings, enamel, medicine, printing, fiber and other industries.

      (Ⅴ) It used in the manufacture of dry cells, in the form of zinc cakes and zinc plates, accounting for about 13%.
          Zinc has suitable chemical properties. Zinc can interact with NH4CL and release H+ positive ions. Zinc-manganese dioxide battery makes use of this characteristic of zinc. Zinc alloy is used as the shell of the battery, which is not only the container of the battery electrolyte, but also participates in the battery reaction to form the anode of the battery. Its performance is also widely used in the pharmaceutical industry.

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