Research Progress in Corrosion and Protection of Stack in Wet Flue Gas Desulfurization System of Power Plants

Wet flue gas desulfurization (WFGD) is the dominant technology among all kinds of technologies of FGD of coal-fired power plants in the world. The flue gas is highly corrosive after WFGD and thus may cause serious corrosion of equipment. Corrosion environment, corrosion mechanism and corrosion characteristics of the stack after WFGD are described. The research progress in controlling methods and materials for the corrosion of the stack after WFGD at home and abroad is summarized , which provides reference to solve the problem of the stack corrosion of coal-fired power plants at home.