Essential Chemistry for IGCSE - Air And Water (Section 5 - No. 16)
In the context of preventing rust, what is sacrificial protection?
Using a coating that prevents oxygen from reaching the metal.
Using a metal that is more reactive than iron.
Using a metal that is less reactive than iron.
Applying a layer of oil to the metal's surface.
Explanation
Sacrificial protection uses a more reactive metal that corrodes instead of the iron.
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