1. Cold-drawn seamless pipes and carbon steel pipes cannot be stacked together, because the materials of carbon steel pipes and cold-drawn seamless pipes are different. In a humid environment, if carbon steel pipes and cold-drawn seamless pipes are combined It is easy to have a chemical reaction when they are stacked together, and then damage the protective layer of the cold-drawn seamless pipe, causing the cold-drawn seamless pipe to rust.
2. If different steels are stacked together in contact, a potential difference will occur, resulting in galvanic corrosion, especially when water accumulates, the galvanic corrosion rate between the cold-drawn seamless pipe and the carbon steel pipe will be accelerated.
3.Like the battery principle, the direct conversion of chemical energy into electrical energy in a chemical battery is due to the oxidation recovery reaction that takes place inside the battery. In order to prevent electrochemical corrosion and carburization of cold drawn seamless pipes, try not to pile them together. However, when the carbon steel and stainless steel are in contact with the countersunk head at normal temperature, the carburizing appearance will not occur immediately, and the gorgeous rust on the cold-drawn seamless pipe will appear after a certain period.