Question

Advantages of rusting

Answer 1

1. Surface rusting forms an oxide layer. It acts as a barrier for air and moisture and thereby preventing the inner metal from rusting.

2. Some metals like zinc act as sacrificial anodes to prevent rusting to other metals.

3. Galvanic corrosion is the principle that is used in batteries. Here, two metals carbon and zinc are intentionally mixed together in a electrolyte solution where zinc rustes faster in order to generate electrical charge.