Corrosion and Extraction Flashcards
1
Q
When does corrosion happen
A
When a metal oxidises with air or water
2
Q
Barrier methods to prevent rusting
A
Greasing, galvanisation, painting the fence
3
Q
Describe galvanisation
A
Coating a less reactive metal with a layer of zinc so it oxidises in preference to it
4
Q
How to extract metals
A
By reacting it with carbon which will gain the oxygen extracting the less reactive metal (redox reaction)
