Can the brake disc touch water? What if it rains? Do you need to change it often(2)
At this time, there will be a clear contrast. Finally, you will find that the whole brake disc cannot work at all, thus affecting the braking effect. Except that the brake disc cannot be watered under high temperature, the brake disc is not afraid of rain, but there will be another phenomenon, that is, the brake disc will rust.
Many people may think that this car should be an old car, or it has been replaced by parts. This is not the case. The problem of brake disc rust is normal. When you brake a few times during normal driving, nothing will happen. When the vehicle is driving on a long downhill road, if it does not change into the appropriate low gear at the appropriate time, it will use the engine speed to restrict, and only rely on long-term braking to slow down the downhill speed.
Therefore, whether it is disc brake or drum brake, the brake hub and brake disc will produce high temperature during braking. If the vehicle cools the brake system by spraying water on the downhill or at the end of the slope, the internal stress of the brake hub or brake disc will change, resulting in the deformation of the brake hub and brake disc.
In addition, it will be annealed to lose its original stiffness, reduce wear resistance during braking, or seriously produce fine cracks. When braking in the rain, the wheels run at high speed. It is difficult to stop the car even if it is raining cats and dogs. Suddenly, a lot of water was watered directly.
It is difficult for rain water to enter the rotating wheels directly. Only the splashing rain wet the brakes. With the rotation of the wheel, the brake itself has the function of ventilation and drying similar to that of a washing machine, throwing away the water in the splashing brake. This is a gradual cooling process of the brake, rather than a sudden cooling. Therefore, when the vehicle brakes in the rain, the impact on the brake hub or brake disc is very small, and there will be no deformation and other phenomena.
If the brake disc is seriously rusted, the surface of the brake disc will be uneven, resulting in dangerous traffic accidents. In this case, we need to find an auto repair shop to disassemble and polish the brake disc and remove rust. Also, do not lubricate the brake discs.
The oil on the surface of the brake disc will reduce the braking capacity, resulting in friction loss between the brake pad and the brake disc, and brake failure, which is very dangerous! We just need to develop a good driving habit. Don't brake suddenly, and don't brake suddenly every day. This is the best way to protect our braking system.