CONTENTS
ALUMINIUM
Aluminium is present on the surface of earth crust in most of the rooks and clay. But to produce the metal bauxite (Al2O3. 2H2O) is ideally suited ore.
PROPERTIES OF ALUMINIUM
[1] Aluminium have silver colour and bright lustre.
[2] Aluminium is very light in weight.
[3] It is a good conductor of electricity.
[4] It has very good resistance to corrosion.
[5] Aluminium melts at 66°C.
[6] It is highly ductile and malleable.
[7] It has high strength to weight ratio.
USES OF ALUMINIUM
[1] It is used to make door and window frames.
[2] Aluminium structural members are becoming popular.
[3] Aluminium wires are used as conductors of electricity.
[4] It is used as a foil.
[5] Aluminium powder serves as pigments in paints.
COPPER
Copper is a naturally available metal in the form of ores which contain small amount of iron and sulphur. After removing impurities, it is processed electrolytically to get purest metal. This metal is almost indestructible. Copper scrap can be processed to get original copper.
PROPERTIES OF COPPER
[1] Copper have reddish brown colour.
[2] Copper structure is crystalline.
[3] It is highly ductile and malleable.
[4] Copper resists corrosion.
[5] Copper can be welded easily at red heat condition.
[6] Dents on the copper can be hammered out.
[7] Copper has high electric and thermal conductivity.
[8] Copper melting point is at 1083°C.
USES OF COPPER
[1] Copper is used as electric wire and cable.
[2] It is used as lighting conductor.
[3] For water proofing the construction joints copper plates are used.
[4] Copper tubes are used for hot and cold water supply, gas and sanitation connections.
[5] It forms a major constituent of brass and bronze.
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