Titanium nanocoatings provide excellent corrosion protection for the inner walls of desulfurization towers

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1. Corrosion of carbon steel in desulfurization towers. The wet flue gas desulfurization technology used in thermal power plants is widely applied in large and medium-sized thermal power plants due to its high desulfurization efficiency, wide suitability for different coal types, mature process technology, long stable operation period, minimal impact from load variations, and high flue gas treatment capacity. It has become the dominant technology for flue gas desulfurization in thermal power plants both domestically and internationally. However, this process is characterized by strong corrosion of the medium, high temperatures in the flue gas being treated, a high solid content in the SO2 absorption solution, significant wear and tear, large areas on the equipment that require corrosion protection, high requirements regarding the quality of construction techniques, and difficulties in repairing corrosion-related failures. 2. Current issues with corrosion protection in desulfurization towers: The commonly used methods for protecting desulfurization towers at present are vinyl resin glass flake coatings and epoxy furan coatings. A common problem with coatings that have been treated for corrosion resistance is their high brittleness, excessive thickness, and short service life. It is easy for the anti-corrosion coating to delaminate from the metal surface, resulting in a loss of its anti-corrosive function. If vinyl glass flake mortar is used, the ratio of curing agent to accelerator in the mixture is low, making it difficult to control; this can easily lead to brittle coatings that reduce their service life. 3. Characteristics of titanium nano-coating: resistant to strong sulfuric acid, hydrochloric acid, and hydrofluoric acid; resistant to alkalis and saltwater; high hardness and good adhesion. Therefore, titanium nano-coatings are an excellent material for addressing the corrosion of metals (and non-metals) in flue gas desulfurization systems, ensuring that the coating remains intact and functional for over 5 years.