How to implement effective corrosion prevention techniques for heat exchanger tubes?

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According to incomplete statistics, in modern large-scale production facilities, especially in integrated production systems for petroleum refining, chemicals, fertilizers, and chemical fibers, various types of heat exchangers are constantly performing the function of converting and transferring thermal energy. According to statistics, heat exchangers account for 20-40% of the total investment in equipment. In industries such as oil refining, chemicals, and fertilizers, tens of thousands of heat exchangers are scrapped each year due to corrosion and scaling. Damaged heat exchangers not only lead to frequent maintenance and replacement tasks, as well as leaks of raw materials and products, posing risks to human health and causing environmental pollution, but they also result in plant shutdowns due to accidents, which incur significant losses in production. Heat exchange equipment is one of the key components in production facilities; most of it is made of carbon steel, accounting for around 30% of all heat exchange equipment. Approximately 60% of the numerous routine repairs for failures and accidents are caused by corrosion and leakage in the tube bundles of heat exchangers. It has severely affected the safe, stable, and full-capacity operation of the production facilities. Furthermore, corrosion forms a rust layer that increases thermal resistance, severely reducing heat exchange efficiency and failing to meet the requirements of production. Therefore, selecting appropriate materials for the tube bundles of cold exchange equipment as well as appropriate control methods to reduce corrosion is an issue that our technical personnel have been focusing on. To date, the corrosion of carbon steel water coolers, condensers, and certain heat exchange tube bundles in enterprises in the petrochemical, coal chemical, and chemical industries has not been properly addressed. In recent years, although some anti-corrosion methods have been developed, they have helped to mitigate the corrosion of tube bundles. A new protection method should be sought to address metal corrosion and scaling on the inner and outer walls of the tube bundle, thereby extending its service life and heat exchange efficiency. If this problem can be solved, it will address a major challenge for the petrochemical industry, and the market potential is huge. I believe that through this discussion, we can exchange the anti-corrosion techniques for heat exchanger tubes that everyone is familiar with, thereby promoting further development of anti-corrosion technologies for heat exchangers in our country.