Nickel, a hard, ductile and ferromagnetic metal, is highly polished and corrosion resistant. Nickel is a ferrophilic element. The earth's core consists mainly of the elements iron and nickel. In the earth's crust, ferromagnesian rocks contain more nickel than silica-aluminum rocks; for example, peridotite contains 1,000 times as much nickel as granite, and gabbro contains 80 times as much nickel as granite.
Nickel (Ni)
1, can improve the strength of steel without significantly reducing its toughness.
2, nickel can reduce the brittle transition temperature of steel, which can improve the low temperature toughness of steel.
3, improve the workability and weldability of steel.
4, nickel can improve the corrosion resistance of steel, not only acid resistance, but also resistance to alkali and atmospheric corrosion.
Nickel is a silver-white metal with magnetic properties and good plasticity. There is good corrosion resistance, nickel nearly silver-white, hard and ductile and ferromagnetic metal elements, it can be highly polished and corrosion resistant. When dissolved in nitric acid, it is green in color. It is mainly used in alloys (e.g. nickel steel and nickel-silver) and as a catalyst (e.g. Raney nickel, especially as a catalyst for hydrogenation).
Nickel is a very versatile metal. According to 1997 statistics, the main uses of nickel are in the following six areas: stainless steel, alloy steels, specialty steels, nickel-based alloys, electroplating and non-alloyed areas.
Nickel is most consumed in stainless steel, which is resistant to both atmospheric, steam and water corrosion, as well as acid, alkali and salt corrosion. Therefore, stainless steel is widely used in chemical industry, metallurgy, construction and a variety of uses, such as the production of petrochemical, textile, light industry, nuclear energy and other industries require welded containers, towers, tanks, pipelines, etc.; urea production of synthetic towers, scrubber towers, condensation towers, stripping towers and other corrosion-resistant high-pressure equipment.
Nickel can also be made into a variety of alloys, such as nickel alloys containing 80% nickel, can withstand high, high fracture strength, dedicated to the manufacture of gas turbines and jet engines. Nickel-chromium alloy mechanical strength, seawater corrosion resistance, it is used for the production of marine vessels turbine engine.
Copper-nickel alloys have excellent corrosion resistance, thermal conductivity and calendering, and are widely used in the marine and chemical industries. Titanium-nickel shape memory alloy will restore the original shape when added, in the medical field is widely used, such as thrombus filters, spinal orthopedic rods, dental orthopedic lip bowstring, brain aneurysm clip, bone splints, artificial joints, femoral head cap, artificial heart with artificial muscle, artificial kidney with micro-pump. Hydrogen storage alloy in the room can absorb hydrogen to generate hydride, heating to not highly and can be released from the hydrogen, the use of this feature greatly facilitates the nuclear reaction and solar energy energy storage and transportation. In recent years, this feature has also been utilized to develop a new type of Ni-MH battery, which does not contain toxic elements known as green batteries, and Ni-Cd batteries are interchangeable, Ni-MH batteries are developing rapidly in Japan, and are mainly used for mobile communications and notebook computers. In addition, Ni-MH-powered automobiles have been introduced into the market.