Why Do Bikes Rust When Left Outside?

Hi Saskia! Let’s break this down step by step so it’s easy to understand why bikes rust.

What is Rust?

Rust is a type of corrosion that happens mainly to metal, like the metals found in bike frames and parts. When metal comes into contact with water and oxygen from the air, it can start to break down and turn reddish-brown. That’s what we call rust!

Why Does This Happen Outside?

When bikes are left outside, they are exposed to different weather conditions:

• Rain: Water from rain can get on the bike and mix with the oxygen in the air, starting the rusting process.
• Humidity: On very humid days, the air has more moisture in it, which means there’s more water around to cause rust.
• Snow: If snow melts, it turns into water that can also sit on the bike, making rust more likely.

What Happens Over Time?

If a bike stays outside for a long time without being taken care of, the rust can spread and damage the metal parts. This makes the bike harder to ride and can even make it unsafe!

How Can We Prevent Rust?

Here are some tips to keep your bike safe from rust:

• Store It Indoors: Whenever you can, keep your bike inside a garage or shed.
• Use a Bike Cover: If you must leave your bike outside, a waterproof cover can help protect it from rain and moisture.
• Keep It Clean: Regularly cleaning your bike can help remove dirt and moisture that can cause rust.
• Apply Oil: Using bike oil on the metal parts can create a protective layer that helps prevent rust.

So, in summary, bikes rust when left outside because of water and oxygen that cause the metal to break down. But if you take good care of your bike, you can keep it looking great and riding smoothly for a long time!