Science Common Sense

158 - How is rust formed?

Rust is formed when iron or steel comes in contact with air and water. Here's a simple explanation:

1. Iron or steel gets exposed to air and water.
2. The air contains oxygen, which mixes with the water.
3. This creates a chemical reaction that breaks down the iron or steel, forming iron oxide (or rust).
4. The rust weakens the metal, making it flaky and brittle.

You can think of it like an apple turning brown when it's cut and exposed to air. It's a similar process that happens with iron or steel when it rusts.