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Anti-corrosion coatings for steel components can be applied in various ways depending on the specific circumstances, such as metal protective layers (e.g., galvanizing), paint coatings, or composite protective layers (i.e., the use of both types of coatings simultaneously). The common method for preventing corrosion in steel structures nowadays is applying anti-corrosion coatings. Coating is an oily or oil-free colloidal solution; when applied to the surface of steel, it forms a thin film that protects the steel structure. Anticorrosion coatings generally consist of a primer and a topcoat. Primers contain a high amount of powder and little binder, resulting in a rough film texture. The function of a primer is to ensure strong bonding between the paint film, the substrate, and the topcoat; in other words, it must provide good adhesion ； Primer contains anti-corrosion pigments that can prevent rust from forming; some of them also provide passivation and electrochemical protection for metals, thereby preventing them from rusting. The topcoat, on the other hand, contains less powder and more binder; it is shiny after forming a film. Its main function is to protect the underlying primer, so it must be impermeable to air and humidity, as well as able to resist physical and chemical degradation caused by weathering. The current trend is to use synthetic resins to improve the weather resistance of the medium. Anti-corrosion coatings with atmospheric resistance can generally only withstand vapor corrosion in the atmosphere. In areas subject to erosion by acids, alkalis, and other substances, acid- and alkali-resistant coatings must be used. Based on their protective functions, anti-corrosion paints can be divided into primer, intermediate coat, and topcoat. Each layer of paint has its own characteristics and performs a specific role; when combined, these layers form a composite coating that enhances anti-corrosion performance and extends the product’s lifespan.