Uses of Chromium
February 6, 2009 · Print This Article
In metallurgy, to impart corrosion resistance, create a shiny finish, or increase hardness:
-Â Â Â as an alloy constituent, such as in stainless steel
-Â Â Â in chrome plating
-Â Â chromic acid is used in some anodizing processes
As dyes and paints:
-Â Â Chromium(III) oxide is a metal polish known as green rouge.
-Â Â Chromium salts color glass an emerald green.
-Â Â Chromium is what makes a ruby red, and therefore is used in producing synthetic rubies.
-Â Â Â also makes a brilliant yellow for painting
- As a catalyst.
- Chromite is used to make molds for the firing of bricks.
- Chromium salts are used in the tanning of leather.
- Potassium dichromate is a chemical reagent, used in cleaning laboratory glassware and as a titrating agent. It is also used as a mordant (i.e., a fixing agent) for dyes in fabric.
- Chromium(IV) oxide (CrO2) is used to manufacture magnetic tape, where its higher coercivity than iron oxide tapes gives better performance.
- In well drilling muds as an anti-corrosive.
- In medicine, as a dietary supplement or slimming aid, usually as chromium(III) chloride, chromium(III) picolinate, chromium(III) polynicotinate or as an amino acid chelate, such as chromium(III) D-phenylalanine.[7]
- Chromium hexacarbonyl (Cr(CO)6) is used as a gasoline additive.
- Chromium boride (CrB) is used as a high-temperature electrical conductor.
- Chromium(III) sulfate (Cr2(SO4)3) is used as a green pigment in paints, in ceramic, varnishes and inks as well as in chrome plating.
- Chromium(VI) is used in the post Ballard preparation of Gravure (rotogravure) printing Forme Cylinders. By electroplating the metal onto the second coat of copper (after the Ballard skin), the longevity of the printing cylinder is increased.
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