The microstructure and composition of the stainless steel water tubes used for the condensers in power plants and the deposits near the corrosion holes were analyzed by SEM and EDS, respectively. The electrochemical reaction mechanism of MnS dissolution and microbial corrosion were explored, and a synergistic effect of both corrosions was found in the process of pitting corrosion. Based on the comprehensive analysis of various factors affecting the stainless-steel's corrosion, some preventive measures are put forward to help the stainless steel condensers function smoothly.%结合发电厂凝汽器不锈钢管内壁腐蚀部位分布规律和腐蚀外貌特征,分别对腐蚀部位沉积物、内壁蚀孔附近管材成分进行扫描电子显微镜观察和能谱分析,探讨了管材中MnS溶解与微生物对凝汽器不锈钢管腐蚀的电化学反应机理,发现二者在点蚀形成过程中具有协同作用,并在综合分析影响不锈钢腐蚀的各种因素的基础上,提出了不锈钢凝汽器在运行过程中应采取的防护措施.
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