Stainless steel strips and carbon steel pipes cannot be stacked together. Why? Because the materials of carbon steel pipe and stainless steel belt are different, in a humid environment, if carbon steel pipe and stainless steel belt are stacked together, it is easy to produce a chemical reaction, which will destroy the protective layer of the stainless steel belt and cause the stainless steel belt to rust.

When different steels are stacked together in contact, a potential difference will be generated, which will lead to galvanic corrosion, especially when there is accumulated water, the galvanic corrosion rate between the stainless steel strip and the carbon steel pipe will be accelerated.

Just like the battery principle, the direct conversion of chemical energy into electrical energy in a chemical battery is due to a redox reaction that takes place inside the battery. In order to prevent electrochemical corrosion and carburization of stainless steel strips, it is best not to stack them together.

However, carburizing will not occur immediately when carbon steel and stainless steel are in contact with each other at room temperature, and the speckled rust on the stainless steel strip will only appear after a certain period of time.