What is corrosion? Describe the electrochemical phenomenon of rusting of iron

Explanation

### Step-by-Step Solution:

**Step 1: Definition of Corrosion**
Corrosion is the gradual destruction of materials, usually metals, through chemical reactions with their environment. This process often involves the formation of metal oxides, sulfates, and other compounds due to moisture and gases present in the atmosphere.

**Step 2: Understanding Rusting of Iron**
Rusting is a specific type of corrosion that occurs in iron and its alloys. It is an electrochemical process where iron reacts with oxygen and moisture, leading to the formation of rust, primarily composed of iron oxides.

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