Why are anti-corrosion coatings used on the tube bundles of carbon steel water coolers to prevent corrosion?

Corrosion and scaling of carbon steel coolers have always been difficult problems for petrochemical companies to solve. There are many ways to prevent corrosion, such as proper material selection, rational design, electrochemical protection, surface coatings, improving operating conditions, and the use of corrosion inhibitors. Using stainless steel tube bundles is too costly, and the Cl‑ ions in the medium will damage the passivation film, resulting in poor performance. Electrochemical protection yields better results on heat exchange equipment in refineries. After years of use, carbon steel water cooler tube bundles with anti-corrosion coatings on their surfaces can achieve good economic benefits; therefore, the use of non-metallic coating materials can effectively address the problems of corrosion and scaling in carbon steel water cooler tube bundles.