船用锅炉过热器管束腐蚀原因分析  

Analysis on the Corrosion Cause of Marine Boiler's Superheater Tube Bank

作　　者：秦晓勇[1] 陈兵[1] 陈德斌[2] 

机构地区：[1]海军工程大学船舶与动力学院,湖北武汉430033 [2]海军工程大学理学院,湖北武汉430033

出　　处：《锅炉制造》2010年第4期23-27,共5页Boiler Manufacturing

摘　　要：针对某船用锅炉过热器第一流程管束非正常失效破损,通过对不同流程管束和腐蚀产物的宏观检查、化学元素分析、扫描电子显微镜形貌分析、以及电子探针和能谱分析,得出破损原因主要是由于管束内外表面的氧腐蚀造成,特别是内表面C l的存在加剧了腐蚀发生的速度,导致第一流程最先失效。所得结果为科学制定腐蚀防治方案提供了理论基础。Aimed at the eondition that the tube bank in the first circuit of one marine boiler superheater is abnormal damaged,the damaged reason is analyzed. According to maeroseopic view,ehemical element analysis,scanning electronic microscope pattern anyais,and electronic probe and energy spectrum analysis on tube bank and corrosion in varied circuits,the results shows that the tubes are damaged by oxygen corrosion. Especially,the Cl exited in the inwall of tube back in the first circuit which accelerated the corrosion speed,and induced the tube bank in the first circuit to be damaged first. The results obtained in this paper provide some therotical foundations for planning corrosion programme properly.

关 键 词：船用锅炉 腐蚀 过热器 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]