摘要
针对船用海水冷凝器铜合金换热管腐蚀失效的问题,对铜合金换热管进行了腐蚀失效分析,进行了换热管失效部位外观形貌分析;对失效的换热管和完好的换热管进行了材料化学成分分析,并与材料的化学成分标准值做了对比;运用扫描电镜对换热管失效部位腐蚀产物进行了射线能谱分析;进行了换热管失效部位腐蚀坑扫描电镜分析。研究结果表明,腐蚀是从换热管内部开始的,并且在换热管腐蚀部位没有检测到砷元素;结合铜合金在海水中的腐蚀失效机理可知,该海水冷凝器换热管失效为换热管材料中砷元素偏析导致的脱锌腐蚀。
Aiming at the problem of marine condenser copper alloy tube corrosion failure, corrosion failure analysis on the copper alloy tube was carried out. Appearance of the failure position on the tube were analyzed. The chemical composition of the material on the failure tube and the intact tube were analyzed, and were compared with the standard value of the chemical composition of material. The corrosion products of the failure location were analyzed by the energy dispersive X-ray analysis using the scanning electron microscopy on the tube. The corrosion pit of the failure location were analyzed by scanning electron microscope analysis on the tube. The results show that, the corrosion is begin from inside of the tube, and detected at the corrosion position of the tube did not arsenic element. Combined with the corrosion mechanism of copper alloy in seawater, the experimental results show that, the seawater condenser tube failure is the segregation of arsenic in materials of the tube caused by dezincification corrosion.
出处
《机电工程》
CAS
2014年第6期753-756,共4页
Journal of Mechanical & Electrical Engineering
基金
温岭市科技计划资助项目(2013C11AA0004)
关键词
船用冷凝器
铜合金管
脱锌腐蚀
材料选择
marine condenser
copper alloy tube
dezincification corrosion
selection of materials
作者简介
熊从贵（1982-），男，重庆云阳人，主要从事压力管道设计、压力容器设计、制造和高效换热器研究及技术质量管理工作．E-mail：1034589719@qq．com
