Tungsten - a metal having a light gray color.In the periodic table it owns 74 serial number.Chemical element is refractory.In its composition it contains five stable isotopes.

chemical properties of tungsten

Chemical resistance of tungsten in the air and in the water is high enough.Upon heating element is exposed to chemical oxidation.The higher the temperature, the higher the rate of oxidation of the chemical element.At temperatures exceeding 1000 ° C, the tungsten starts to evaporate.At room temperature aqua regia, hydrochloric, sulfuric, nitric and hydrofluoric acids can not exert any action on tungsten.A mixture of nitric and hydrofluoric acids dissolved tungsten.Neither in liquid or solid tungsten is not mixed with gold, silver, sodiu
m, copper, lithium.Also there is no interaction with zinc, magnesium, calcium, mercury.Tungsten is soluble in tantalum and niobium, and chromium and molybdenum can form solutions in solid or liquid.

Application tungsten

tungsten applied in modern industry both in pure form and in alloys.Tungsten relates to a wear-resistant metals.Most alloys having a part of tungsten, used for the manufacture of turbine blades and valve engines.Also, this chemical element found its application in the manufacture of various parts in the X-ray technology and Electronics.Tungsten filaments for light bulbs used.

Chemicals tungsten recently found their practical application.Phosphotungstic heteropoly acid used in the production of bright paints and varnishes that are resistant to light.For the manufacture of luminous dyes and lasers applied tungstates manufacturing rare earth elements, alkaline earth metals and cadmium.

Today, traditional wedding rings of gold began to replace products made from other metals.Popularity purchased wedding rings made of tungsten carbide.These products are highly durable.Mirror polished rings will not tarnish with time.The product retains its original state for the whole period of use.

Tungsten is used as an alloying addition to steel.This gives strength and toughness of steel at high temperature.Thus, tools made from tungsten steel are capable of withstanding very intensive processes of metalworking.