What is the purpose of blueing the exhaust pipe?

[SanCorey]

Bluing the exhaust pipe is for rust prevention. It can extend the service life and also has an aesthetic decorative function. Introduction to automobile exhaust pipes: Automobile exhaust bellows, also known as automobile exhaust flexible pipes, are installed in the exhaust pipe between the engine exhaust manifold and the muffler, providing a flexible connection for the entire exhaust system to reduce vibration and noise. Functions of automobile exhaust pipes: For the automobile body, the exhaust pipe plays a role in reducing vibration and noise, as well as extending the life of the exhaust and muffler system. The main working principle is to divert the airflow through multiple channels, where these diverted flows rub and collide with each other, gradually reducing the flow velocity. This cycle repeats, ultimately allowing the exhaust gases to be discharged through the automobile exhaust pipe, thereby reducing noise.