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Nickel (or nichelio) is a chemical element with atomic number 28.  Its symbol is Ni.

Its name derives from the Swedish name Nickel, short for Nicolaus, and anciently associated with a person of little worth, goblin or restless boy, full of life[1].  There is also the German derivate Kupfernickel ("devils copper"), name given by miners of this element once considered without value.

Nickel is a white silver metal.  It belongs to the iron group, it is hard, malleable and ductile.

Nickel is one of five ferromagnetic elements.  It is often accompanied by cobalt:  both can be found in meteoric iron.  It is rather appreciated for the properties it gives to metal alloys in which it is part.  Due to the specific alloy used, the American coin known as "nickel"  2] (nickel) it is not ferromagnetic, whereas the equivalent Canadian one used to be, until the coinage 1958 year.

Nearly  65% of nickel  in the western world is used to make  austenitic stainless steel;  another 12% is used for super alloys.  The remaining 23% needed is divided into other types of steel, rechargeable batteries, catalyts  and other chemical products, coining), foundry products and coatings.

Due to its optimal resistance to oxidation, the use of nickel is found in:

  • stainless steel and other alloys which are resistant to corrosion

  • nickel steel,  used in low temperatures processes

  • alnico, an alloy used in magnets

  • mumetal, that has an especially high  magnetic permeability, which is used to shield magnetic fields

  • monel, which is a nickel alloy highly resistant to corrosion, used in ship propellers, cooking equipment, and chemical industrial plants

  • Aaloys with shape memory, such as nitinol, used in robotics and in orthodontics (a branch of dentistry)

  • rechargeable batteries, such as metal nickel-hydride  and nickel-cadmium

  • coining:  In the United States and in Canada nickel is used in the one-cent coins; in Italy, coins of 50 and 100 Lire used to be made of acmonital or cupronickel, two nickel alloys, many other countries use and have used nickel in their coins

  • electro-deposition

  • chemical lab crucible pots

  • hydrogenation of vegetable oils: in this case, nickel is finely pulverized and becomes a catalys;

  • iron, brass, and other metal material coatings

  • some alloys, German silver,  for example

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