Is It Normal for Brake Discs to Rust?
2 Answers
Brake disc rusting is a normal phenomenon. Solutions include: 1. Minor rust: It can be polished off through normal braking. Friction between the brake pads and the brake disc will occur, and after several brakes, the rust can be removed, restoring normal use; 2. Severe rust: The brake pads can be removed and polished, but this will shorten the service life of the brake disc. It is best to replace the brake disc with a new one. Rust on the brake disc will make the surface uneven, causing directional shaking and abnormal noises during braking. The brake disc is an important component of the braking system, divided into solid brake discs and ventilated discs.
Yes, brake disc rust is quite a common phenomenon, and I think it's completely normal. As a seasoned driver, I've noticed that every time after rain or when the car hasn't been driven after washing, some reddish-brown rust spots appear on the brake discs. This happens because most brake discs are made of iron, which easily oxidizes and rusts when exposed to moisture or humid air. Don't worry—just driving and applying the brakes a few times will clear the rust through friction, without affecting braking performance. However, if the rust is too thick, such as after leaving the car parked outdoors for several weeks without moving, it might wear out the brake pads or cause unstable braking. In such cases, I recommend taking a short drive or having it checked by a professional. For daily maintenance, I prefer parking in dry areas to avoid rust buildup in humid environments.
