Most nickel on Earth is inaccessible because it is locked away in the planet's iron-nickel molten core, which is 10 % nickel. 70% nickel, 30% copper with traces of iron, manganese and silicon), which is not only hard but can resist corrosion by sea water, so that it is ideal for propeller shaft in boats and desalination plants. Monel is an alloy of nickel and copper (e.g. It resist corrosion even at high temperatures and for this reason it is used in gas turbines and rocket engines. Nickel is easy to work and can be drawn into wire. The remaining 23% of consumption is divided between alloy steels, rechargeable batteries, catalysts and other chemicals, coinage, foundry products, and plating. 12 % of all the nickel consumed goes into super alloys. About 65 % of the nickel consumed in the Western World is used to make stainless steel, whose composition can vary but is typically iron with around 18% chromium and 8% nickel. Nickel alloys are characterized by strength, ductility, and resistance to corrosion and heat. The major use of nickel is in the preparation of alloys. Nickel dissolves slowly in dilute acids but, like iron, becomes passive when treated with nitric acid. It also forms a number of complex compounds.
In its familiar compounds nickel is bivalent, although it assumes other valences. It is a fairly good conductor of heat and electricity. It is of the iron group and it takes on a high polish.
Nickel - Ni Chemical properties of nickel - Health effects of nickel - Environmental effects of nickel Separation and Concentration Purification Request.Plant Inspection & Process Optimalisation.
0 kommentar(er)
