Is it normal for automobile exhaust pipe to rust? What to do?

It is normal for the exhaust pipe to rust. If it is not serious, it will not be guaranteed: 1. Pay attention to the choice of road conditions, such as saline-alkali land, mud, etc., and try to choose better road conditions. If it is really unavoidable, pay attention to clean it up in time; 2, the choice of parking spaces, it is best not to park in the open air, especially at night, the exhaust pipe is likely to condense dew, then the water can evaporate without high temperature, just like the slow corrosion of steel, so it is best to have an underground garage; 3, try to avoid short-distance driving, short-distance driving, the speed has not yet arrived, and at the destination, the water in the exhaust pipe has not been discharged in time, and the exhaust pipe is easy to oxidize. It is best to blow two feet of throttle, clean up the accumulated water in the exhaust pipe, and then turn off the fire.