First：Physicochemical properties of nickel

      Nickel is a silver white ferromagnetic metal, and is the main component of many magnetic materials.

      Nickel also has good oxidation resistance and strong corrosion resistance.

     Nickel is a silver white metal. The density is 8.9 g /cm3, and the melting point is 1455. Ancient Egypt, China and Babylonians used high iron content as a utensil. It can be said that nickel is a "old" and "young" metal.

    Nickel also has good oxidation resistance. In air, NiO film forms on the surface of nickel, which prevents further oxidation.It is proved that rust of 99% nickel will not rust in 20 years. The corrosion resistance of nickel is very strong, especially for caustic alkali. In 50% of boiling caustic soda, the corrosion rate of nickel is not more than 25 microns per year.Nickel is also very good in strength and plasticity. It can withstand all kinds of pressure.

Second： use of nickel

 Nickel is widely used to produce various types of stainless steel, soft magnetic alloy and alloy structural steel.

 Nickel is the main material for the production of nickel cadmium, nickel hydrogen batteries and nickel mesh.

 Nickel is also widely used in electroplating and catalyst production.

 Nickel is used to make various types of stainless steel and soft magnetic alloys (which can be easily understood as magnetic alloys that are easy to magnetize under the external magnetic field and remove the magnetic induction intensity (magnetic sense) after the external magnetic field. What we are talking about here is mainly nickel iron soft magnetic alloy. And alloy structural steel.

 Nickel and chromium, copper, aluminum, cobalt and other elements can be composed of heat resistant alloys, electrical alloys and corrosion resistant alloys.

Nickel chromium alloy (such as Ni-Cr20) has high heat resistance and large resistance. The thermoelectric body (resistance wire) made of it can be used as electric heating elements such as electric furnace, electric iron, electric iron and so on. It can work for a long time at 1100 degrees. Although Ni-Cr9 and Ni-Cr10 are slightly poor in heat resistance, the resistance is large, the temperature coefficient of resistance is small and the thermoelectric potential is big. It is thermoelectric. It is thermoelectric. My good material.

Ni based heat resistant alloys are mainly used for turbine engines, turbine discs, combustion chambers and turbine blades. The famous "Monel" alloy is an anticorrosive nickel alloy containing copper, iron and manganese. It has high strength, good plasticity and corrosion resistance. It has become an important material in the manufacture of electrical appliances, sea wheels and medical equipment.

The new orthodontic alloy, China titanium nickel Beijing coloured Research Institute has developed a kind of titanium nickel alloy, which has superelasticity and shape memory effect. It is an ideal orthodontic material. Orthodontic correction is achieved by the resilience of metals.

Ni Si alloys are often made of wires, belts and rods for electronic tubes and electrical vacuum instruments.

Nickel - iron and nickel - cobalt alloys are good magnetic materials. Nickel is the main material for the production of nickel cadmium, nickel hydrogen batteries and nickel mesh. At the same time, nickel is also widely used in electroplating and catalyst production.

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