Why do some car brake discs rust easily, while others don't rust easily?
Very few cars actually have ceramic discs! Brake discs are divided into carbon fiber ceramic brake discs and metal (cast iron) brake discs based on their material. We know that carbon fiber ceramic brake discs do not rust, while gray cast iron is prone to corrosion. Of course, carbon fiber ceramic brake discs are rarely used in household vehicles due to their high manufacturing cost and poor braking force at low temperatures, so the reason for the material may be relatively small.
In order to increase heat resistance and inhibition, metal brake discs are processed into carbon fibers. Combining the advantages of both, this type of brake disc is not easy to rust. Our ordinary cars basically use semi metal brake discs, but there is a phenomenon that everyone is watching. German and American cars are both washed, that is, when the car is cleaned, the brake discs rust.
"Whether or not there will be brake discs does not represent the quality of the car. It mainly depends on the requirements of different car manufacturers for vehicle production and driving experience, the selection of brake disc materials, and ceramic brake discs. These brake discs are all equipped with top-notch supercars."
Ceramic brake discs are not ordinary ceramics, but carbon fibers and silicon carbide synthesized at a high temperature of 1700 degrees. The greatest advantage of reinforced composite ceramics is that they can effectively resist thermal decomposition. When driving at high speeds, the braking effect is excellent, and the heat resistance is many times higher than that of ordinary brake discs. However, the price is dozens of times higher than that of cast iron brake discs, usually tens of thousands of times.
"The current anti-corrosion technology is nothing more than painting, surface treatment, electroplating, chemistry, cathodic protection, and other methods. However, vehicle body anti-corrosion is nothing more than a" coating "process, which involves galvanizing or spraying oil on the vehicle body, and isolating oxidation reactions on items such as the chassis. However, can they be used on brake discs?"
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Of course not. This is a place where friction often occurs. If the material is not replaced, even thicker coatings can wear, not to mention reduce friction. Vehicles that are not used for a long time are most likely to rust because there is a lot of dust on the brake discs that are not used for a long time, which can absorb moisture from the air.
When exposed to oxygen in the air, an oxidation reaction occurs, which we call rust. Iron can easily oxidize when the air (oxygen) and water are sufficient. Of course, cars that have not been used for a long time can also easily rust when parked in wet, high pH places.
It's not that some brake discs don't brake well, but that some people use more vehicles, such as friends who commute every day, and their brake discs don't have a chance of getting rusty, right? It is normal for a car that is not frequently used to have its brake discs rust in this rusty weather.
As long as the car is used again, the rust will be removed automatically, no problem. Therefore, it is not that some brake discs are of good quality and do not rust, as the title suggests. It is directly related to the use environment. Generally, the rust on the brake discs has little impact. In fact, when driving, you can wipe off the rust by pressing the brake a few times.
When the brake disc is heavily rusted, normal braking cannot achieve perfect rust removal. When the brake disc is heavily rusted, it can lead to uneven surface of the brake disc. In this case, braking can cause the vehicle body to shake, and the owner can clearly feel that the steering wheel is abnormal, the vehicle body, and the brake pedal. In this case, it is necessary to go to a specialized workshop to remove the rust on the brake disc