Pitting corrosion

Pitting corrosion happens when a metal gets hurt or damaged on the surface. It can happen when the metal is in contact with water, salt, or acids. The damage creates little holes or pits that can grow deeper and bigger over time.

The pits can weaken the metal, making it easier to break or bend. Imagine you have a toy car that you play with outside. Now, imagine that the car gets a scratch on the surface where the paint comes off. The scratch may not look like a big deal, but it can start to collect dirt and other things that can damage the metal underneath. If you keep playing with the car, the scratch can become bigger and deeper until the car won't work anymore. Pitting corrosion happens in a similar way.

If you've ever seen rusty metal, you've seen a form of corrosion. Rust is a type of corrosion caused by the metal reacting with oxygen in the air. Pitting corrosion is different because it happens in small areas instead of spreading all over the metal.

Pitting corrosion can be prevented by protecting the metal from things that can hurt it. This can be done by putting a coat of protective paint or using a different type of metal that is less likely to corrode. If you see pitting corrosion on something, like a bike or a car, it's important to get it fixed so it doesn't get worse.