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Factors affecting the cost of corrosion protection for steel structures in the atmosphere: Chemical plants require repairs to their equipment, and steel structures need to undergo re-corrosion protection treatment. Choosing the right anti-corrosion coating can reduce coating costs and extend the lifespan of the coating film, thereby significantly saving on investment expenses for anti-corrosion measures. 1. Reduce coating costs. Coating costs include the cost of the paint, the cost of application, and the cost of pre-treatment. When considering the comparison of coating costs, the unit price of the coating is merely an intuitive factor affecting its cost; it is the solid content (volume) that represents the true price of the coating. Solid volume refers to the proportion of volume occupied by the substances that can cure into a film in solvent-based coatings. The higher the solid volume, the larger the coating area that can be achieved with the same film thickness, with a direct proportional relationship between them. The coating has a high solid content and a high application rate, which allows for a relative reduction in the amount of coating used ； A single application results in a thick film, which reduces the number of applications and painting costs; it also shortens the interval between repaints, thereby improving work efficiency. Among the coating costs, the cost of pretreatment accounts for the largest proportion. When conventional anti-corrosion coatings and high-performance anti-corrosion coatings are used, the cost of surface preparation is high due to the stringent requirements for such preparation; this cost is even higher than the sum of the cost of the coating itself and the cost of application, accounting for over 60% of the total coating cost. Therefore, choosing high-performance anti-corrosion coatings that require minimal surface preparation – allowing painting on rusted or wet surfaces – can significantly reduce the costs associated with surface preparation, which is a key factor in lowering the overall coating cost. 2. Extending the lifespan of the coating film: The lifespan of the coating film is an important factor affecting corrosion prevention costs. For conventional coatings or high-performance anti-corrosion coatings that require stringent surface treatment, in practical use, due to the structure of the equipment components or the conditions of the installation environment, sandblasting for rust removal can be inconvenient, or it may inadvertently leave behind risks of corrosion ； Or due to changes in climate humidity, there may be imperceptible dew or rust formation on the surface of the substrate, leading to rapid rusting even after painting. If the pre-treatment does not meet the required standards, it severely affects the lifespan of the coating layer; many manufacturing companies are forced to suspend production for repairs, resulting in additional economic losses. Therefore, the costs associated with corrosion prevention, both direct and indirect, throughout the entire lifespan of the equipment components are quite high. With the development and successful application of high-performance anti-corrosion coatings that can be applied with rust and in wet conditions, these products effectively address the problem of corrosion caused by residual rust or re-rusting, as well as the issue of moisture causing internal corrosion to the coating under various environmental conditions. This makes anti-corrosion coating applications simpler and easier in different environments, facilitates ensuring the quality of the installation, and guarantees a long-lasting anti-corrosive lifespan for the coating layer. Compared to maintenance once a year, performing maintenance only every few years can save substantial costs associated with anti-corrosion measures, and it also avoids the economic losses resulting from production interruptions due to maintenance – having a very significant impact on a company’s profitability.