凝汽器黄铜管断裂原因分析  

Root Cause Analysis of Copper Tube Fracture in Coelescer

作　　者：来维亚[1,2] 马新沛[1] 徐中甲 陈吉刚[3] 

机构地区：[1]西安交通大学材料科学与工程学院,陕西西安710049 [2]渭河煤化工集团公司 [3]西安热工研究院,陕西渭南714000

出　　处：《石油化工腐蚀与防护》2005年第5期45-48,共4页Corrosion & Protection In Petrochemical Industry

摘　　要：文章分析了断裂黄铜管的材料状态,并对断裂黄铜管的垢层、断裂特征、界面层微观形貌进行了分析研究,确定凝汽器黄铜管内壁已遭受沉积物垢下氯离子缝隙腐蚀,断裂特征属腐蚀疲劳,动应力来源于运行中的管束振动。探讨了腐蚀机理,提出了防护措施。The status of cracked copper tubes is analyzed. The fouling, cracks and micro topography of the cracked tubes are studied. It is concluded that tubes crack because of the under-fouling crevice corrosion by chlorine ions. The fracture features corrosion fatigue cracking with dynamic stress coming from tube vibration. The corrosion mechanisms is explored and the preventive measures are recommended.

关 键 词：凝汽器黄铜管 腐蚀 断裂 原因分析 断裂原因分析 黄铜管 凝汽器 断裂特征 材料状态 微观形貌 

分 类 号：TG172.9[金属学及工艺—金属表面处理]