Metals Flashcards
1
Q
Why is a layer of aluminium used in food packaging?
A
Hygiene
Acts as a barrier to light, heat, odour and impurities
Adds to the strength of the card
Keeps the product cool once chilled
2
Q
What is an alloy?
A
A combination of 2 or more metals
3
Q
What is a ferrous metal?
A
A metal that has iron in it
4
Q
What is a non-ferrous metal?
A
A metal that does not have iron in it
5
Q
Features of aluminium
A
Tarnishes with oxygen Light weight Non-magnetic Resists corrosion Conducts heat Malleable Non-toxic
6
Q
Advantages of duraumin
A
Can be fromed into complex shapes
Can be colourd
Excellent strength to weight ratio
Does not corrode or rust
