Cars For Scrap Flashcards
What is rust?
Rust needs iron, oxygen and water. The chemical name for rust is hydrated iron(III) oxide
Do all metals rust?
No, only iron and steel rust, other metals corrode
What makes rusting faster?
Salt, water and acid rain
Why doesn’t aluminium corrode in moist air?
It has an impermeable oxide layer that stops it from reacting with oxygen.
What does rusting have to do with oxidation?
It is an oxidation reaction where iron reacts with oxygen, iron gains oxygen.
What is the word equation for rusting?
Iron + oxygen + water à hydrated iron(III)oxide
How is iron different to aluminium physically?
Iron is denser, magnetic, it rusts easily aluminium is light, non-magnetic and doesn’t corrode
How are iron and aluminium similar?
Both malleable and both good conductors
What is steel?
Steel is a mixture of 99% iron, 1% carbon
Why is steel more useful than iron?
Steel is harder and stronger than iron, it is slightly less likely to corrode.
What are the advantages of building cars from aluminium?
Aluminium cars are lighter and resistant to corrosion. Better fuel economy, last longer.
What are the disadvantages of building cars from aluminium?
Price, aluminium will be much more expensive.
What are the main materials in a car?
Steel, copper and aluminium. Glass, plastic and fibres (carpets).
Why recycle the materials in a car?
Saves natural resources, reduces disposal problems.
What advantages are there to using recycled materials in cars?
Reduces costs of disposal if parts and materials can be recycled. Tyres, wiring, etc.
