9.2 Reactivity Series & Corrosion of Metals Flashcards
1
Q
What is rusting?
A
A chemical reaction between iron, water & oxygen.
2
Q
State the word equation for rusting
A
iron + water + oxygen → hydrated iron(III) oxide
3
Q
List 2 common ‘barrier’ methods for rusting
A
Paint and Oil
4
Q
Define galvanising
A
A process where iron to be protected is coated in a layer of zinc
5
Q
How can the zinc be coated onto the iron?
A
Electroplating or dipping in molten zinc
6
Q
Define sacrificial protection
A
When a more reactive metal reacts to protect the metal it is coating from corrosion
