Aluminum's light weight and corrosion resistance are two outstanding characteristics of its performance.

1, aluminum density is very small, only 2.7g /cm³, although it is soft, but can be made into a variety of aluminum alloy, such as hard aluminum, super hard aluminum, rust aluminum, cast aluminum, etc.. These aluminum alloys are widely used in aircraft, automobiles, trains, ships and other manufacturing industries.

In addition, space rocket, space shuttle, artificial satellite also use a large number of aluminum and its aluminum alloy. For example, a supersonic plane is made up of about 70 percent aluminum and its aluminum alloy. Aluminum is also used extensively in ship construction. A large passenger ship often uses several thousand tons of aluminum.

2. Aluminum is second only to silver, copper and gold in electrical conductivity. Although it has only two thirds the conductivity of copper, it has only one third the density of copper, so it has only half the mass of copper to transport the same amount of electricity.

The oxide film on the surface of aluminum not only has the ability of corrosion resistance, but also has a certain insulation, so aluminum is widely used in electrical manufacturing industry, wire and cable industry and radio industry.

3, aluminum is a good conductor of heat, its thermal conductivity is 3 times greater than iron, industrial aluminum can make all kinds of heat exchangers, heat dissipation materials and cooking utensils.

4, aluminum has good ductility (its ductility is second only to gold and silver), at 100 ℃ ~ 150 ℃ can be made into thinner than 0.01mm aluminum foil. These aluminum foil is widely used for packaging cigarettes, candy, etc., can also be made into aluminum wire, aluminum strip, and can be rolled various aluminum products.

5. The surface of aluminum has a dense oxide protective film, which is not easy to be corroded. It is often used to manufacture chemical reactors, medical devices, refrigeration devices, petroleum refining devices, oil and gas pipelines, etc.

6, aluminum powder with silver luster (general metal in powder color is black), often used to do paint, commonly known as silver powder, silver paint, in order to protect iron products from corrosion, and beautiful.

7. Aluminum, which gives off a great deal of heat and brilliant light when burned in oxygen, is often used to make explosive mixtures. Such as ammonium aluminum explosive (made of ammonium nitrate, charcoal powder, aluminum powder, smoke black and other combustible organic compounds), combustion mixture (such as thermite made of bombs and shells can be used to attack difficult to fire targets or tanks, artillery, etc.) and lighting mixture (such as barium nitrate 68%, aluminum powder 28%, shellac 4%).

8. Thermite is often used to melt refractory metals and weld rails, etc. Aluminum is also used as a deoxidizer in steelmaking. Aluminum powder and graphite, titanium dioxide (or other high melting point metal oxide) according to a certain ratio of uniform mixing, coated on the metal, calcined by high temperature and made of high temperature resistant cermet, it has an important application in rocket and missile technology.

9, aluminum plate reflectance of light is also very good, reflecting ultraviolet light is stronger than silver, the purer aluminum, its reflectance is better, so it is often used to manufacture high-quality mirrors, such as solar oven mirrors.

10, aluminum has sound absorption performance, sound effect is also better, so broadcasting rooms, modern large building indoor ceiling also use aluminum.

Low temperature resistance, aluminum at low temperature, its strength increases without brittleness, so it is ideal for cryogenic device materials, such as cold storage, freezer, Antarctic snow vehicles, hydrogen oxide production units.

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