Rust is a common problem for bicycle chains, especially if they are not properly maintained. Rust can cause the chain to become stiff and difficult to move, and it can also lead to premature wear and tear. There are a few different ways to remove rust from a bicycle chain, but the most effective way is to use a rust remover. Rust removers are available at most hardware stores, and they are relatively inexpensive. To use a rust remover, simply apply it to the chain and allow it to sit for the amount of time specified on the product label. Once the rust remover has had time to work, rinse the chain thoroughly with water and dry it completely.
In addition to using a rust remover, there are a few other things you can do to prevent rust from forming on your bicycle chain. First, make sure to clean and lubricate your chain regularly. This will help to protect the chain from the elements and prevent rust from forming. Second, avoid riding your bike in wet or muddy conditions. If you do ride your bike in wet or muddy conditions, be sure to clean and dry the chain thoroughly afterwards. Finally, store your bike in a dry place when you are not using it. This will help to prevent rust from forming on the chain and other parts of the bike.