Chromium Powder

English Name: Chromium

CAS No.: 7440-47-3

Molecular formula: Cr

Molecular weight: 52

EINECS No.: 231-157-5

Physical properties: chromium is a silvery white shiny metal. Pure chromium has ductility. Chromium containing impurities is hard and brittle. Density 7.20g/cm3. Soluble in strong alkali solution. Chromium has high corrosion resistance and oxidizes slowly in the air, even in the red hot state. Insoluble in water. Plating on metal can play a protective role.

Application: due to the brittleness of chromium alloy, it is still being studied as a metal material. Chromium is mainly used in the form of ferroalloy (such as ferrochrome) to produce stainless steel and various alloy steels. Chromium is used as an additive for aluminum alloy, cobalt alloy, titanium alloy, superalloy and resistance heating alloy. Chromium oxide is used as a light and heat-resistant coating, as well as an abrasive, a colorant for glass and ceramics, and a catalyst for chemical synthesis. Basic chromium sulfate (trivalent chromium salt) is used as tanning agent for leather. Chrome alum and dichromate are used as mordant, impregnant and various pigments for fabric dyeing. Chromium plating and chromizing can make steel, copper, aluminum and other metals form a corrosion-resistant surface, which is bright and beautiful. It is widely used in furniture, automobile, construction and other industries. In addition, chrome ore is also widely used to make refractory materials.