What does rust smell like?

Rust itself doesn't have a distinct smell, but it is often associated with a metallic, earthy odor due to the iron oxide that forms when iron oxidizes. This smell can be influenced by the presence of moisture or other materials, such as decaying organic matter nearby. In some cases, rust may also carry a faint scent reminiscent of stale or damp metal. Overall, the odor of rust is subtle and might not be easily recognizable.