1394439
C2d
- Rusting
- Salt water makes the rusting
reaction much faster. In
winter icy roads are treated
with salt (so car bodies rust
quicker)
- Acid rain also
increases the rate of
rusting
- Any reaction in which
oxygen is added is
called an oxidation
reaction
- iron + water + oxygen →
hydrated iron(III) oxide
- iron + water + oxygen →
hydrated iron(III) oxide
- Salt water makes the rusting
reaction much faster. In
winter icy roads are treated
with salt (so car bodies rust
quicker)
- Aluminium does not rust - corrode. Its
surface is protected by a natural layer of
aluminium oxide. This prevents the metal
below from coming into contact with air
and oxygen. Unlike rust, which can flake off
the surface of iron and steel objects, the
layer of aluminium oxide does not flake off
- Advantages and
Disadvantages of
Building Cars from
Aluminium and Steel
- S is
stronger
and
harder
than A
- A is more
malleable
than S
- A does
not
corrode
as easily
as S
- A is less
dense
than S
- S for a car
body is
cheaper
than A
- S is
stronger
and
harder
than A
- Advantages
of Aluminium
in Cars
- A car with an
aluminium
body is lighter
so has better
fuel economy
- Does not corrode
as easily so car
body has a much
longer lifetime
- A car with an
aluminium
body is lighter
so has better
fuel economy
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