Why is there rust inside the wheels of a new car?

[VanGriffin]

It is normal for the steel rims inside new car tires to have surface rust, as they are made of cast iron, and this generally does not affect their normal use. Many car models use aluminum alloy to make the wheel hubs. The advantage of aluminum alloy is that it is sturdy and durable, but the downside is that it is susceptible to acid. Aluminum is easily oxidized when exposed to acid, and if placed in a strong acidic environment, aluminum alloy wheel hubs can indeed corrode. Specific details are as follows: 1. Rust condition: If the rust on the brake disc is minimal, no special treatment is needed, as the slight rust will be removed during braking while driving. If the rust is more severe, it may cause vibrations or shaking during braking, such as brake pad vibration, steering wheel vibration or shaking, or body vibration. 2. Timely maintenance: Severe rust is difficult to remove through braking, and even if the rust is removed, it may cause brake vibration due to uneven thickness of the brake disc. Therefore, it is necessary to perform maintenance on the brake disc every two months to prevent the rust from becoming too severe.