Polymer-based anti-corrosion porcelain coating

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Power plant flue gases generally contain corrosive substances such as sulfides, chlorides, and nitrides; in particular, SO3 present in the flue gases significantly lowers the dew point temperature. In the areas where acid water dew point corrosion occurs, the condensation-evaporation of flue gas leads to very high concentrations of acid water and extremely low pH levels, resulting in severe corrosion of metal equipment. To prevent the damage caused by dew point corrosion to equipment, Zhiseng Weihua Tanggong explains that molecular chain extension technology is used to graft functional molecular structures into the polymer chains for hybridization and optimization; at the same time, the main polymer chains are extended through grafting, thereby achieving an appropriate molecular weight for the polymers. Various ceramic components such as nano-silicon powder, silicon carbide, boron nitride, aluminum oxide, graphite, ultra-fine zinc oxide, titanium oxide, ceramic microspheres, and zirconium oxide are added to the modified hybrid polymer film-forming solution. The cured polymer-based anti-corrosion coating has a heat resistance of up to 750 degrees, and is resistant to wear, fire, as well as acid and alkali corrosion. This new type of polymer-based anti-corrosion coating offers good film-forming properties, strong adhesion, a smooth and self-cleaning surface, high temperature resistance, and a dense film structure that reduces dielectric loss. The solid pigments in coatings are used to create wear-resistant ceramic functional fillers under high-temperature sealing conditions; this enhances the hardness and wear resistance of the coating, as well as its corrosion resistance, high-temperature tolerance, impact resistance, and good ductility. Coatings are applied along with inorganic ceramic fibers to increase the interlaminar strength of the coating and enhance its impact resistance. Appropriate pigments, solvents, additives are also included in the coating, along with wear-resistant enhancers. Anticorrosive ceramic-coated polymers are widely used in various equipment such as power plant flue stacks and chimneys, desulfurization and denitrification systems, dust collectors, induced draft fans, pipes for high-temperature equipment, RTO furnaces, heat exchange tubes, waste heat boilers, economizers, air preheaters, and GGH heaters.