Does Carbon Steel Rust?
2 Answers
Carbon steel does rust. Car bodies are made of carbon steel because of its high hardness, which helps protect the vehicle owner and provides good aerodynamic performance. A well-constructed body using quality materials can enhance the car's driving performance. Car bodies can be divided into two types: body-on-frame and unibody. Body-on-frame structures use a rigid frame, while unibody structures do not have a rigid frame. If stored in a dry environment, rusting will be minimal, but in a humid environment, rusting can be more severe. However, applying anti-rust oil to carbon steel can significantly reduce the likelihood of rusting.
Carbon steel does rust because it primarily contains iron, which easily oxidizes when exposed to oxygen and moisture, forming red rust. I've noticed when observing automotive parts that this material is commonly used for engine mounts or body frames, and exposure to rain or humid environments accelerates the corrosion process. To prevent rust, automakers typically apply anti-rust paint or use electroplating treatments, but over time, as the coating wears away, problems become exposed. If your car has carbon steel components, it's important to regularly check for rust spots—for example, thoroughly drying after washing or applying silicone spray to form a protective layer. From experience, rust not only affects appearance but also weakens structural strength.
