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An Analysis Of The Properties Of Aluminum

1550 words - 6 pages

An Analysis of the Properties of Aluminum

Physically, chemically and mechanically aluminium is a metal like
steel, brass, copper, zinc, lead or titanium. It can be melted, cast,
formed and machined much like these metals and it conducts electric
current. In fact often the same equipment and fabrication methods are
used as for steel.

Light Weight

Aluminium is a very light metal with a specific weight of 2.7 g/cm3,
about a third that of steel. For example, the use of aluminium in
vehicles reduces dead-weight and energy consumption while increasing
load capacity. Its strength can be adapted to the application required
by modifying the composition of its alloys.

Corrosion Resistance

Aluminium naturally generates a protective oxide coating and is highly
corrosion resistant. Different types of surface treatment such as
anodising, painting or lacquering can further improve this property.
It is particularly useful for applications where protection and
conservation are required.

Electrical and Thermal Conductivity

Aluminium is an excellent heat and electricity conductor and in
relation to its weight is almost twice as good a conductor as copper.
This has made aluminium the most commonly used material in major power
transmission lines.

Reflectivity

Aluminium is a good reflector of visible light as well as heat, and
that together with its low weight, makes it an ideal material for
reflectors in, for example, light fittings or rescue blankets.

Ductility

Aluminium is ductile and has a low melting point and density. In a
molten condition it can be processed in a number of ways. Its
ductility allows products of aluminium to be basically formed close to
the end of the product’s design.

Impermeable and Odourless

Aluminium foil, even when it is rolled to only 0.007 mm thickness, is
still completely impermeable and lets neither light aroma nor taste
substances out. Moreover, the metal itself is non-toxic and releases
no aroma or taste substances which makes it ideal for packaging
sensitive products such as food or pharmaceuticals.

Recyclability

Aluminium is 100 percent recyclable with no downgrading of its
qualities. The re-melting of aluminium requires little energy: only
about 5 percent of the energy required to produce the primary metal
initially is needed in the recycling process.

1. Lightweight The specific gravity of Aluminium is 2.7, about
one-third that of iron (7.9) and copper (8.9).

This feature is particularly important in transportation industries:
for example, aircraft, automobiles; trains and ships. It contributes
to energy saving in transporting, increasing loading capacity and
speed. Aluminium is used as a material for high-risk

2. Excellent corrosion resistance When Aluminium is exposed to air, a
thin oxidised film...

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