CORROSION MECHANISM AND PREVENTION FOR FLUE GAS CLEANING EQUIPMENT

The corrosion environment and corrosion mechanism for flue gas cleaning equipment are introduced and discussed.The dew point of flue gas is heightened by acidic gases of SO_2,SO_3 and HCl etc.The flue gas may dew on the surface of the cleaning equipment and produce an acidic electrolyte and thus corrosion cell forms and electrochemical corrosion occurs.The technology of anticorrosion for device of wet flue gas desulfurization(FGD) process is reviewed.Some self-made anticorrosion conductive coatings are introduced for flue gas cleaning equipment by corona discharge.