Must be solved flue and chimney facing the current world and China and corrosion of chimneys and flues, mainly in the following four types of corrosion-resistant materials (1) Chimney corrosion materials - glass, steel;. (FRP) ① Because FRP chemical corrosion and low cost than high-nickel alloy, so many wet from the system unit using fiberglass has achieved good results, according to foreign materials, glass and steel has been successfully applied in wet FGD systems following areas: absorption column body, lime dissolving tank, water traps, mist eliminators, slurry pipes, flues, chimneys. ② Because glass steel table smooth, easy fouling, wear acid. Therefore, a high velocity and high concentration of particulate matter areas usually have better results FRP series of anti-corrosion materials in the domestic market of the more common are: epoxy, modified OM have special anti-corrosion coating (2) chimney anti-corrosion materials - rubber in the domestic market is relatively common. There are silicone rubber, polyurea, but the product is not high temperature, acidity can be an excellent waterproof and is not conducive to a long straight rows coal-fired units (3) chimney anti-corrosion materials - glass flake due mainly glass flake filler material is SiO2, its temperature resistance, excellent acid resistance, more common in the market are: foam glass tiles and glass flakes (4) chimney anti-corrosion materials - acid clay ① Use for wet FGD acid brick chimney liner inner tube corrosion. Coating temperature resistance and good acid resistance, adhesion, and long life (20 years), long-term effects can withstand high temperature flue gas long-term erosion and rapid thermal quench conditions, the net emissions after wet FGD flue chimney liner corrosion special coating materials. ② characteristics KY2 acid clay coating is a high quality silica, dispersants, stabilizers and fine aggregates and other raw materials, scientifically formulated by a certain percentage, which has the following excellent features: excellent chemical resistance, high temperature wet corrosive gas properties; low water vapor permeability, curing shrinkage, low coefficient of linear expansion; able to withstand long-term erosion and high temperature flue gas of acute thermal quench conditions; excellent wear resistance; good viscosity bondability; room temperature curing, molding construction is simple, easy to repair.