MCQ : In cathodic protection of iron, which is acting as an anode?

Question

In cathodic protection of iron, which is acting as an anode?

1. iron
2. Magnesium
3. Platinum
4. H₂O

Answer

(b) Magnesium

Explanation:

In the cathodic protection of iron, another metal with a more negative electrode potential is used as the anode to protect the iron from corrosion. Typically, a more reactive metal such as magnesium or zinc is used as the anode.