particle size:80mesh,100mesh,150mesh,200mesh,320mesh
UN no.:3089
CAS no.: 7440-47-3
chemical composition:
Cr -99.64%
C-0.02%
O- 0.35 %
S-0.005%
Fe- 0.17 %
AI-0.15%
P-0.002%
Silvery white metal, qualitative very hard and corrosion. 7.20 g/cm3 density. Melting point 1857 + 20 °C, boiling point 2672 °C. Combining power + 2, + 3 and + 6. Ionization energy (ie) is 6.766 electron volts. Metallic chromium in acid general with surface passivation for its characteristics. Once to passivation, that is easily dissolved in almost all of the acid. Under high temperature oxidation by which water vapor, carbon monoxide in 1000 °C was the oxidation. Under high temperature, chromium and nitrogen and react by alkali eroded. Soluble in alkali solution. Chrome has the very high resistance to corrosion, in air, even in the red state, oxidation or slow. Insoluble in water. In the metal plating as protection.
Application:
Pigments, dyes, corrosion/oxidation resistant plating and coating (for critical equipment), H.I.P., refractory products, superalloys, stainless steel, electronics, sputtering source, magnetic storing materials, batteries, catalyst, welding alloys, and thin film for electronics,etc.
Because chrome sex brittle, as metal material is used in the study, chrome mainly ferroalloy (such as ferrochrome) form used in the production of stainless steel and various kinds of alloy steel. Metallic chromium alloy, cobalt alloy, used for high temperature alloy, titanium alloy and resistance of additives such as fever alloy. Chrome oxide used as light resistance, heat resistant coating, also can be used as abrasive, glass, ceramic colorants, chemical synthesis catalyst. Chromium ", heavy chromate salt used for leather tanning, dyeing fabrics of impregnant, mordant and all kinds of pigment. Chromium plating and permeability can make steel and copper, aluminum and other metal forming corrosion resistant surface, and bright beautiful, used in large furniture, automobile, building industry, etc