Atomistry » Chromium » Compounds » Chromium Tungsten Carbide
Atomistry »
  Chromium »
    Compounds »
      Chromium Tungsten Carbide »

Chromium Tungsten Carbide, 3Cr3C2.W2C

Chromium Tungsten Carbide, 3Cr3C2.W2C, is formed by heating a mixture of chromic oxide, tungstic acid, and carbon in a carbon crucible in the electric furnace for five minutes with a current of 400 amperes under 75 volts, and treating the product with warm hydrochloric acid, and then with concentrated ammonia solution; or by heating a mixture of chromium, tungsten, carbon, and copper in a carbon crucible, and dissolving the copper from the product by washing with nitric acid. The double carbide is obtained in small, hard, crystalline grains, of density 8.41 at 22° C.; it is not magnetic. It is attacked by chlorine at 400° C.; bromine acts only slowly at 500° C., while iodine at that temperature does not affect it. When heated in air it does not burn. It is not attacked by acids; fused potassium hydroxide or alkali carbonates react only slowly; fused alkali nitrates or potassium chlorate rapidly decompose it, giving a mixture of chromate and tungstate. When heated in hydrogen chloride, chromic chloride, tungsten chloride, hydrogen, and methane are formed.

Last articles

Zn in 7L0B
Zn in 7KZZ
Zn in 7KZL
Zn in 7L3O
Zn in 7L52
Zn in 7L6T
Zn in 7KZ7
Zn in 7L6R
Zn in 7KKM
Zn in 7KKQ
© Copyright 2008-2020 by
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy