First we need to know its main structure. The first is the galvanized barrel. Generally speaking, there are two galvanizing processes for galvanizing barrels, hot-dip galvanizing and cold galvanizing. However, the galvanized barrel produced by any process has a galvanized layer on the surface. It can protect the galvanized barrel itself from external corrosion, thus ensuring the service life.
Iron barrels are prone to directly react with chemical elements in the air, resulting in rust and other phenomena. The biggest difference between the two is that the galvanized drum has a protective layer that can extend the service life limitedly, while the iron drum has a relatively short service life and is prone to rust.