The problems of stack corrosion coming from WFGD for old units are discussed.The corrosion mechanism is analyzed,and the anticorrosion scheme is proposed.

• 针对老电厂实施湿法烟气脱硫后带来的烟囱腐蚀问题,探讨了旧烟囱的腐蚀机理及防腐方案。