Prevention of corrosion of iron by Zn coating is called

Options

A. Galvanization
B. Cathodic protection
C. Electrolysis
D. Photoelectrolysis.

Explanation

To solve the question regarding the prevention of corrosion of iron by zinc coating, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Corrosion**:
- Corrosion is a chemical process where metals, such as iron, are gradually deteriorated due to reactions with environmental factors, primarily atmospheric gases. This leads to the formation of compounds like oxides, sulfides, and carbonates.

2. **Identifying the Problem**:
- The question specifically asks about the prevention of iron corrosion. Iron is particularly susceptible to corrosion when exposed to moisture and oxygen in the air.

3. **Zinc Coating as a Protective Measure**:
- One common method to prevent iron from corroding is to coat it with zinc. Zinc acts as a sacrificial anode; it will corrode in place of iron, thus protecting the iron beneath the coating.

4. **Terminology**:
- The process of applying a zinc coating to iron to prevent corrosion is known as **galvanization**. This term specifically refers to the technique of coating iron or steel with zinc to protect it from rusting.

5. **Conclusion**:
- Therefore, the prevention of corrosion of iron by zinc coating is called **galvanization**.

### Final Answer:
The prevention of corrosion of iron by Zn coating is called **galvanization**.

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