【摘要】 针对某电厂700 MW对冲式燃烧锅炉水冷壁腐蚀严重问题，对该锅炉高温腐蚀产生的原因进行了分析。在现场割取了腐蚀的水冷壁管，对其腐蚀垢层进行了X射线衍射（XRD）、能量色散X射线谱（EDS）和扫描电镜（SEM）分析，结果发现腐蚀产物中主要含有ZnS、FeS、Fe₇S₈、Fe₃O₄和α-FeOOH,推定此炉主要为硫化物型高温腐蚀，并制定了该锅炉的防治措施。更多还原

【Abstract】 Aiming at the serious problem of water wall corrosion of a 700 MW opposed-firing boiler in a power plant, the cause of high temperature corrosion of the boiler was analyzed. The corroded water-cooled wall tube was cut at the site, and the corroded scale layer was analyzed by X-ray diffraction（XRD）, X-ray energy dispersive specturn（EDS） and scanning electron microscope（SEM）. The results showed that the corrosion products contained ZnS, FeS, Fe₇S₈,Fe₃O₄ and α-FeOOH. It was concluded that the furnace was mainly sulphide type high temperature corrosion, and the prevention and control measures were formulated for the boiler.更多还原