Why is there a noise from the brake pads after rain?
4 Answers
Noise from brake pads after rain may be caused by fine sand brought up by rainwater adhering to the brake disc, or it could be due to missing or damaged fixing screws of the brake disc. Below is relevant information about car brakes: Introduction to brakes: Braking, also known as deceleration, refers to the action of stopping or reducing the speed of moving locomotives, vehicles, other transport tools, or machinery. The general principle of braking is to fix a wheel or disc on the high-speed shaft of the machine and install corresponding brake shoes, bands, or discs on the machine base to generate braking torque under external force. The braking device, also known as a decelerator, is a mechanical braking device that can slow down the vehicle speed. Classification of brakes: Drum brakes, advantages of drum brakes, disadvantages of drum brakes, disc brakes, etc.
I've encountered the issue of brake pads making strange noises after rain several times. Usually, it's because the air is humid after rain, and water seeps between the brake pads and brake discs, causing surface rust or dirt accumulation. When braking, the friction produces that sharp squealing sound. This is actually a normal phenomenon, and many cars return to normal after driving for a few minutes post-rain. I remember once after a heavy rain, I started the car and immediately heard a piercing noise, which startled me. Later, after gently applying the brakes a few times, the sound gradually disappeared, and everything was fine. However, if the noise persists for too long or is accompanied by a harsh grinding sensation, it might indicate severe brake pad wear, and you should promptly visit a repair shop for inspection. Otherwise, braking performance could be compromised, affecting safety. In short, strange noises after rain aren't a big deal, just address them promptly.
As an ordinary commuter who drives daily, squeaky brake pads after rain are a common occurrence. The reason is moisture accumulating on the brake components, causing rust or dirt buildup that creates friction when braking. Don't panic - this issue is easily solved. Just gently pump the brakes a few times before driving to wear off the rust. If parked in low-lying areas with more water accumulation, the noise might be louder. If it's really bothersome, simply change your parking spot. However, if the noise persists for several days or you feel vibration when braking, it might indicate the brake pads need replacement. Paying attention to this small detail during rainy days can save you a lot of hassle.
I'm quite curious about the squeaky brake pads after rain. The explanation is that rainwater moistens the metal surfaces, forming a thin layer of rust or adhering impurities, which alters friction under braking pressure and generates high-frequency noise. It sounds alarming, but in most cases, the noise disappears after gently applying the brakes a few times and isn't a cause for concern. If the car has been parked for a long time and encounters heavy rain, the sound becomes more noticeable. It's recommended to start slowly and test the brakes after each rainy drive. Don't worry too much; this is very common.
