Do brake pads always rust?

[LeHazel]

Brake pads can rust, which is a normal phenomenon. Below is relevant information about brake pads: 1. Function of brake pads: Automotive brake pads, also known as brake linings, refer to the friction materials fixed on the brake drums or discs that rotate with the wheels. The friction linings and blocks bear external pressure to generate friction, thereby achieving the purpose of vehicle deceleration. 2. Composition of brake pads: Automotive brake pads are generally composed of steel plates, bonded heat insulation layers, and friction blocks. The steel plates are coated to prevent rust, and the coating process uses an SMT-4 furnace temperature tracker to monitor the temperature distribution during coating to ensure quality. 3. Inspection of brake pads: Under normal driving conditions, the brake linings should be inspected every 5,000 kilometers. The inspection should include checking the remaining thickness, the wear state of the linings, whether the wear on both sides is even, and whether the retraction is smooth. Any abnormal conditions must be addressed immediately. When replacing, use the brake pads provided by the original equipment manufacturer to ensure the best braking effect and minimal wear between the brake pads and discs.

[VanHeidi]

I've been driving this old car for several years and have seen quite a few cases of brake pad rust, especially during the rainy season or when the car is left idle for long periods. Typically, the backing plate of brake pads is made of metal, such as iron, which tends to oxidize and rust when exposed to humid air. However, not all brake pads are like this—for example, after I switched to ceramic brake pads, they hardly rust at all. Rust doesn’t affect the actual braking function because driving and applying the brakes will wear off the rust layer. My advice is not to go to great lengths over this; driving more often or parking in a dry place can help alleviate the issue. If the rust is severe, consider upgrading to rust-resistant materials for peace of mind, as both aesthetics and safety matter.

[McHadley]

As a car enthusiast, I know the key to brake pad rust lies in the material composition. Traditional cast iron brake pads definitely rust because iron oxidizes easily in humid conditions. But new materials like ceramic or polymer composites rarely rust. Rust mainly appears on non-working surfaces and is automatically removed during friction, having no impact on braking performance. Rust formation is a chemical reaction, so I recommend prioritizing rust-resistant pads in humid areas. Regular driving can prevent rust; upgrading brake pads can improve overall reliability.

[LeGeorge]

When I first learned to drive, I noticed that brake pad rust was quite common. But rest assured, not all brake pads are like this; ceramic ones rarely rust. The rust usually appears on the metal parts and doesn't affect braking performance—it disappears after a few presses of the brake pedal. I think beginners shouldn't worry; as long as the brakes work normally, rust is a minor issue. A simple solution is to park away from rain and consult a technician when choosing pads.