How does cathodic protection of iron operate ?

Explanation

### Step-by-Step Solution:

1. **Understanding Cathodic Protection**:
- Cathodic protection is an electrochemical method used to prevent the corrosion of iron. Corrosion is an electrochemical process where metals deteriorate due to reactions with their environment.

2. **Coupling with a More Reactive Metal**:
- In cathodic protection, iron is coupled with another metal that is more reactive than iron. This means that this metal has a greater tendency to lose electrons and get oxidized compared to iron.

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