Interesting facts about Aluminum

• Approximately 8% of the Earth's solid surface (by weight) is aluminum.

• Aluminum is the most abundant metal in the Earth's crust. It is also the third most abundant element in the Earth's crust - behind oxygen and silicon.

• Aluminum does not occur in nature in its pure form. It is only found in combinations with other minerals.

• Aluminum is one of the most difficult metals to extract or purify. Consequently, aluminum metal wasn't isolated until the 1820s.

• Aluminum has been produced in commercial quantities for just over 100 years.

• It is estimated that since 1972, some 16 million tons of aluminum cans have been recycled. These 785.6 billion aluminum cans placed end-to-end could stretch to the moon more than 249 times.

• Although the electrical conductivity of aluminum is only about 60% that of copper per area of cross section, aluminum is used in electrical transmission lines because of its light weight.

• The alloys of aluminum are used in the construction of aircraft and rockets.

• The corrosion resistance of aluminum is excellent due to a thin surface layer of aluminium oxide that forms when the metal is exposed to air, effectively preventing further oxidation.

• Aluminium is one of the few metals which retain full silvery reflectance in finely powdered form, making it an important component of silver paints.

Source: wikipedia.org, et al.

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