Rust will reduce the strength of the chain and reduce pulling. If rust is rusty, it is necessary to clean the surface in time. Select some rust -proof products for rust -proof oil according to the actual needs, such as rust -proof oil, you need to choose according to the situation. The rust rust of the chain belongs to a chemical reaction, which can be said that rust is a compound. Metals are easier to rust in humidity or water. Therefore, the chain should avoid the humid environment when saving. The dust on the surface of the chain should be cleaned in time to keep dry.