C2D - What Should We Make Cars From Flashcards
What type of reaction takes place with the corrosion of iron and why ?
Oxidisation because the iron gains oxygen
What two things need to be present for iron to corrode ?
Oxygen & Water
When iron forms iron oxide explain what happens with the water ?
It becomes loosely bonded to the iron oxide resulting in hydrated iron oxide
What’s the word equation for iron corrosion ?
Iron + Oxygen + Water = Hydrated Iron Oxide
What happens if water is salt or acidic ?
Rusting takes place a lot quicker
Does aluminium corrode when wet ?
Nope
What happens if aluminium doesn’t corrode ?
Aluminium reacts with oxygen to form aluminium oxide
How come aluminium only reacts with oxygen once ?
The aluminium oxide acts as a protective layer and sticks to the aluminium
Why is the iron oxide flaky ?
It’s porous so oxygen & water can penetrate lower layers
What are the advantages of aluminium over steel ?
Lower density so car body will be lighter which saves fuel economy which saves fuel resources
Corrodes less so has a longer lifetime
What’s aluminiums let down ?
Super expensive
Why is steel used in cars ?
Strong so can be hammered into sheets & welded together
What is steel good for ?
Bodywork
Why is aluminium used in cars and where ?
Strong and low density. Used in engine to reduce weight
Why is glass used ?
Transparent for windows
