Why Does the Exhaust Pipe of a New Car Rust?

[VonMarley]

When the exhaust pipe is in operation, its surface temperature is extremely high. Since manufacturers do not apply paint to it, the surface remains completely exposed. Over time, it is eroded by various acidic and alkaline substances, sewage, and other factors, combined with the high-temperature working environment, making rust on the exhaust pipe inevitable. Related Information: 1. Exhaust Pipe: Installed between the engine exhaust manifold and the muffler, it connects the entire exhaust system linearly to reduce vibration and noise, facilitate installation, and extend the lifespan of the exhaust muffler system. 2. Exhaust Pipe Structure: The exhaust pipe features a double-layer corrugated tube covered with a steel wire mesh sleeve, with clamping ring structures at both straight ends. To enhance noise reduction, the corrugated tube may include an expansion joint or mesh sleeve internally.