aluminium present xxx
DESCRIPTION
MSE-HUSTTRANSCRIPT
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PROPERTIES-Density-Corrosion Resistance -Electrical and Thermal Conductivity -Light and Heat Reflectivity - Ductility
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The density of aluminiumThe density of aluminium is 2,7
g/cm3 ,around one third that of steel. Used advantageously in applications
where high strength and low weight are required.
=>> Greater in load capacity and reduced fuel consumption.
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Corrosion Resistance of Aluminium
-When the surface of a luminium metal is exposed to air, a protective oxide coating forms almost instantaneously.-If the oxide becomes scratched and aluminium metal exposed, more oxide is formed and the protected layer renewed.
-This oxide layer is corrosion resistant and can be further enhanced with surface treatments such as anodising.
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Electrical and Thermal Conductivity of Aluminium
Thermal Conductivity : 202.4 W/mK
Resistivity: 2,82×10−8 Ωm
The great advantage of a luminium is that by weight, the conductivity of a luminium is around twice that of copper.=>> Aluminium is an excellent conductor of both heat and electricity.
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Light and Heat Reflectivity of Aluminium-Aluminium is a good reflector of
both visible light and heat
-Reflectivity : High 71% unpolished and when polished: 97% => Aluminium is extremely reflective, when polished (some sources say) it is the most reflective material, for this reason it is now frequently used in lights.
-Electrical Resistivity : Low 2.65 x 10 -8 Ohm metres=> Aluminium has slow electrical resistivity and therefore has high electrical conductivity
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High ductility- Aluminium is easy when plastic
deformation , spinning, wire and rolled into sheets,foil, tape, film (foil), pressed into bars flowing with the contour length (profile) complex very different issue.
=>> Summary: Aluminium has a unique set of properties that make it so essential to the modern world. It is ductile , strong (in alloys), lightweight, highly conductive, and extremely reflective.
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APPLICATION AND USE OF ALUMINIUM
Electrical ConductorsMaterial of construction for Transport
PackagingBuilding and ArchitectureFoilsMiscellaneous Applications
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Electrical Conductors- Aluminium alloys have a conductivity averaging 62% of the International Annealed Copper Standard (IACS) but, because of its density, it can carry more than twice as much electricity as an equivalent weight of copper.
- A very large proportion of overhead, high voltage, power lines utilise aluminium rather than copper as the conductor on weight grounds.
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Material of construction for Transport
-The transport and automotive industry is the fastest-growing market segment for aluminium suppliers.
-Various alloys of aluminium are now also used in passenger and freight rail cars, commercial vehicles, military vehicles, ships & boats, buses & coaches, bicycles and increasingly in motor cars.
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Packaging
-The successful use of the 1000 series alloys as foil for food wrapping and for containers utilises their good corrosion resistance and barrier properties against UV light, moisture and odour.
-The most significant use of aluminium in packaging has been in the production of beverage cans which incorporate the easy open ring pull' in the lid.
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Building and Architecture
Shaped aluminum Nhôm kính nội thất
Loose aluminium foil, or aluminium sheets + ribbion = “Hotel Marques de Riscal”..
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FoilsAluminium is produced in
commercial foils as thin as 0.0065 mm (or 6.5 µm). Material thicker than 0.2mm is called sheet or strip.
Light aluminum foil
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Miscellaneous Applications of Aluminium
Road barrier lithographic printing plates
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SUMMARYAluminium is the world's most abundant
metal and verry important in our life.By utilising various combinations of its
advantageous properties such as strength, lightness, corrosion resistance, recyclability and formability, a luminiu m is being employed in an ever-increasing number of applications.
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