Question
In cathodic protection of iron, which is acting as an anode?
- iron
- Magnesium
- Platinum
- 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.