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Chromium - School Essays

Chromium

is a very hard, brittle, gray metal, which is sometimes
referred to as Siberian red lead. It does not rust easily and becomes shiny and
bright when it is polished. The shiny trim on our automobile bumpers and door
handles is usually electroplated .
Most chromium comes from something called chromite which is a mixture
of chromium , iron, and oxygen. Chromite is a common rather ordinary black
mineral that no one really noticed until more recent times. Nearly all the
world's supply of chromite comes from Zimbabwe, Russia, Turkey, South Africa,
Cuba, and the Philippines. The United States imports almost all its chromite.
Chromium is added to other metals to make them ...

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They are also used for ball bearings and the hard
cutting edges of high-speed machine tools.
Nickel is highly resistant to electric current and is often added to
chromium steels to make them easier to work. For example, stainless steel
sinks can be pressed out from flat sheets of steel that can contain 18 percent
chomium and 8 percent nickel.
When nickel is mixed with chromium, the resulting metal can stand
very high temperatures without corroding. For example, the heating elements of
toasters can be made from an alloy that is 80 percent nickel and 20 percent
chromium. This metal operates at a temperature of about 1380 degrees
Fahrenheit (750 degrees Celsius).
Chromium was discovered in 1798 by the French chemist Nicolas
Vauquelin. He chose the name chromium from the Greek word chroma, which means
color. Chromium was a good choice of name, many chromium compounds are brightly
colored. Rubies are red and emeralds are green because they contain ...

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Chromium. (2008, May 21). Retrieved April 8, 2026, from http://www.essayworld.com/essays/Chromium/83988

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PAPER DETAILS

Added: 5/21/2008 07:47:08 AM
Category: Science & Nature
Type: Premium Paper
Words: 483
Pages: 2

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