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The flue gas desulfurization method in thermal power plants involves the use of physical and chemical treatment processes to remove sulfur dioxide from flue gas; the absorption tower and chimney are the key equipment in the wet flue gas desulfurization process. However, the composition of the ethylene waste alkaline solution is complex. When the equipment is operating normally, the environment inside the tower is characterized by highly alkaline misty vapor and soluble salt deposits. The pH value of the waste alkaline solution is 13; after the reaction, the wastewater becomes more acidic and highly corrosive, causing damage to the equipment. To ensure the long-term use of the desulfurization tower, it is necessary to address this corrosion issue. I. Causes of corrosion: 1. Corrosion caused by desulfurization gases: The catalytic gas contains large amounts of ammonia and carbon dioxide, which react to produce hydrogen sulfide, an acidic gas that is soluble in water. Under high temperatures, this substance causes pitting and uniform corrosion of the equipment. 2. Erosive corrosion: The waste alkali solution contains a large amount of solid particles, and solid particles such as dust in the flue gas can also cause erosive corrosion. 3. Ammonium salt corrosion: This occurs mainly in heat exchangers and air coolers; at low flow rates and low temperatures, corrosive crystals are formed and adhere to the inner walls of the tube bundles, resulting in erosion pits. II. Protective measures against corrosion in desulfurization towers: Traditional anti-corrosion methods involve using stainless steel plates or materials such as glass fiber and resin for protection, but the drawbacks of using these methods over the long term are evident; they are not resistant to acid and alkali corrosion, cannot withstand high temperatures, and severe erosion can lead to their detachment. In response to such situations, various anti-corrosion coatings have been developed. Among them, Sorex CMI heavy-duty anti-corrosion material boasts excellent comprehensive performance and outstanding results, which has won the favor of various manufacturers. This material is heat-resistant, corrosion-resistant, and wear-resistant; it is a high-functionality two-component thermosetting polymer coating. The highly cross-linked structure formed after curing is fundamentally different from that of other coatings, which enables the product to exhibit excellent performance and superior corrosion resistance. This anti-corrosion material with an extremely high cross-linking density can withstand hydrolysis and acid attack; it possesses excellent adhesion strength and bonding properties. It has good chemical resistance to hot flue gases, concentrated hydrochloric acid, sulfur dioxide, and sulfuric acid, as well as the ability to resist the impact of fly ash and particulates.