Corrosion (Paper 1) Flashcards
1
Q
What type of reaction is rusting of Iron?
A
A redox reaction
2
Q
What does the metal lose in a redox reaction?
A
Electrons
3
Q
What is needed for Iron to rust?
A
Both water and oxygen
4
Q
What are the ways to prevent rusting?
A
-Painting
-Oiling or greasing
-Sacrificial protection using a more reactive metal than Iron
-Galvanising (an example of sacrificial protection) a coat of zinc is used on the iron
5
Q
What is electroplating?
A
Applying a metal coating to an object using electrolysis. The cathode is electroplated using the anode and the electrolyte is a solution containing the metal ions of the metal you are plating. It is used to stop corrosion and improves apprearance.
