Chromium uses stainless steal1/13/2024 ![]() Note that some of the types of stainless steel are described as 'austenitic', meaning that they are composed of the gamma allotrope of iron:Īn austenitic, general purpose stainless steel widely used in furniture.Īustenitic chromium-nickel-manganese alloy series used for general purpose metalwork.Īustenitic chromium-nickel alloy series. Stainless steel has its own list of classifications, each of which will be explained in outline below. Chrome alum is Chromium (III) potassium sulfate and is used as a mordant (i.e., a fixing agent) for dyes in fabric and in tanning.Since steel can be alloyed with an infinite number of combinations of alloying elements, a classification system has been developed to facilitate easy identification of the compounds used.Chromates are added to drilling muds to prevent corrosion of steel under wet conditions.Potassium dichromate is a chemical reagent, used as a titrating agent.Modern cleaning solutions are highly effective and chromium free. The use of dichromate cleaning solutions is now phased out due to the high toxicity and environmental concerns. Sodium dichromate is sometimes used because of its higher solubility (50 g/L versus 200 g/L respectively). It is prepared by dissolving potassium dichromate in concentrated sulfuric acid, which is then used to wash the apparatus. Chromic acid is a powerful oxidizing agent and is a useful compound for cleaning laboratory glassware of any trace of organic compounds.Chromium (III) oxide (Cr2O3) a green pigment (coloring agent) in paint, asphalt roofing, and ceramic materials refractory bricks abrasive.Chromium (IV) oxide is used to manufacture magnetic tape used in high-performance audio tape and standard audio cassettes. It’s ideal shape anisotropy, which imparts high coercivity and remnant magnetization, made it a compound superior to γ-Fe2O3. Chromium (IV) dioxide (CrO2) is a magnetic compound.In metallurgy to provide corrosion resistance and a shiny finish.As a catalyst in dyeing and tanning of leather.To manufacture molds for the firing of bricks.Rubies get their red color from chrome, and glass treated with chrome is emerald green in color. Chromium compounds are used as industrial catalysts and pigments (in light green, yellow, red and orange colors).However, the wastewater is toxic, so alternatives are being studied. About 90% of all leather is tanned with chrome.Chrome plating of plastics, which are often used in bathroom fittings, is also possible. Chrome-plated car and truck parts such as bumpers were once common. Chrome plating can be used to give steel a highly polished finish.Chromium is used to harden steel, make stainless steel (named because it does not rust) and make various alloys.The name of the element chromium (from Greek chrōmos, “colour”) connotes the pronounced and varied colorations of chromium compounds. The green colour of emerald, serpentine, and chrome mica and the red colour of ruby are due to small amounts of chromium. Chromium-plated car and lorry parts, such as bumpers, were once very common.Ĭhromium (Cr), chemical element of Group 6 (VIb) of the periodic table, a hard steel-gray metal that takes a high polish and is used in alloys to increase strength and corrosion resistance.Ĭhromium was discovered (1797) by the French chemist Nicolas-Louis Vauquelin and isolated as the metal a year later it was named for its multicoloured compounds. Chromium plating can be used to give a polished mirror finish to steel. Chromium is used to harden steel, to manufacture stainless steel (named as it won’t rust) and to produce several alloys.
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