硫化锰夹杂溶解和微生物存在对不锈钢管的点蚀  

Pitting Corrosion of Stainless Steel Pipes via MnS Dissolution and Microbial Corrosion

作　　者：姬鄂豫[1] 陈海玲[1] 李长鸣[2] 

机构地区：[1]南阳理工学院,南阳473004 [2]河南电力试验研究院,郑州450007

出　　处：《应用化学》2012年第1期100-105,共6页Chinese Journal of Applied Chemistry

基　　金：河南省科技厅项目(0524270015)

摘　　要：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。The microstructure and compo：sition 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.

关 键 词：凝汽器 不锈钢管 MnS溶解 微生物腐蚀 

分 类 号：O646.6[理学—物理化学]