Chrome Oxide

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  • Chrome oxide is the stable oxide of the chromium,it is a dark green crystalline powder insoluble in alkalis and acids.
  • It is prepared from the mineral Chromite mined in southern Africa, Asia, Turkey and Cuba.
  • As with other coloring agents, chrome must be milled fine enough to eliminate specking in glass or glaze.
  • Chrome oxide is bassically employed in raw glazes whereas potassium dichromate is used in fritted glazes.
  • From Cr2O3 becomes 2CrO3, oxygen is captured from the surroundings, the percentage is greater than 100.
  • Chrome Oxide Green is an inorganic pigment whose olive-green color classified as Pigment Green by the Colour Index System.
  • Chrome Oxide Greens are used in a large applications because it is have excellent opacity, outdoor durability and heat fastness.
  • Its hardness is also highly valued for surface finishing, where Chrome Oxide Greens are used as abrasive components.
  • It is also used as a base oxide to produce several metal oxide based pigments.
  • Chromium Oxide is estimated by converting this to chromate and titrating with potassium permanganate solution after passing the chromate to react with Ferrous ammonium sulphates solution.
  • Chromium oxide coatings are generally inert, have high mechanical strength, hardness and good optical characteristics; therefore, it is used in many applications including corrosion protection wear resistance, electronics, and optics.
  • Cr2O3 is suited for wear resistance applications, as it is one of the hardest oxides with 29.5 GPa hardness.
  • Chrome oxide is non toxic and should not be confused with other "chrome" pigments.
  • For this pigment the chrome is in the trivalent form, which is inert.
  • It has no apparent toxicological or adverse environmental impacts.
  • Chromium oxide green is a abrasive pigment which can damage dispersion equipment.
  • Chromium oxide green used in camouflage coatings, because its excellent fastness properties and its ability to reflect infrared radiation.
  • Chromium oxide coatings is deposited on carbon steel by radiofrequency reactive magnetron sputtering at different oxygen flux values.
  • X-ray diffraction, x-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy were used to investigate the microstructure of chromium oxide coatings.
  • Varying oxygen flux changed the coating microstructure; as with increasing oxygen flux the chromium oxide coating undergoes amorphous- to- crystalline transformation.
  • The coating developed strong texture at higher oxygen flux.
  • Hardness, elastic modulus, wear resistance, and adhesion were investigated by nanoindentation and pin-on-disk tests.
  • With changes in the coating microstructure as a function of increased oxygen flux, hardness, elastic modulus, and wear resistance were improved, but its adhesion was weakened.
  • Hydrated chromium oxide is permanent, but chromium oxide is more stable and is one of the most permanent pigments an artist uses.
  • It will not react with hydrochloric acid or with sodium hydroxide.
  • Though chomium oxide green is not a serious health hazard, it can cause irritation of the skin and eyes, and can cause nausea and other problems if ingested.
  • It also can cause respiratory problems when dust is inhaled.
  • It is not a fire hazard, and does not readily react with other materials.
  • Ceramic chrome oxide is dense, corrosion resistant coatings for resistance to wear by abrasive grains, hard surfaces, particle erosion and cavitation.
  • Coatings are insoluble in acids, alkalis and alcohol, some common applications are: pump seal areas, grounds, rolls and wear rings.
  • Chromium LLP announced earnings results for the six months ended June 30, 2011.
  • The company reported revenue of $115.1 million against $104.5 million for the same period a year ago, profit was $26.2 million against $16.1 million for the same period a year ago.

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