金属加工（热加工）Issue(5)：77-82,6.
某电厂凝汽器管焊缝穿孔失效分析
Failure analysis of weld seam perforation in condenser tubes of a power plant
摘要
Abstract
After chemical cleaning,perforations were observed in the weld seams of the condenser tubes at a power plant.To determine the cause of leakage and the mechanism of perforation,the analysis was implemented,including scale composition analysis,microstructure,water analysis etc.The results show that the main composition of the scale is CaCO3,along with certain corrosive elements such as S and P.The hard scale deposits restricted the flow of corrosion products,leading to under-deposit corrosion.During the chemical cleaning process,the violent reaction between sulfamic acid and calcium carbonate produces plenty of CO2 gas,resulting in cavitation corrosion.Given the inherent weakness of the tube welds and combined with these factors,perforation ultimately occurred.By analyzing and offering rational recommendations,it provides a reference for future problem resolution.关键词
凝汽器管/TP304/垢下腐蚀/空泡腐蚀/失效分析Key words
condenser tube/TP304/deposit corrosion/cavitation corrosion/failure analysis引用本文复制引用
张启礼,杨景标,曹福想,陈伟兵..某电厂凝汽器管焊缝穿孔失效分析[J].金属加工（热加工）,2026,(5):77-82,6.基金项目
国家市场监督管理总局科技计划项目(2024MK099) （2024MK099）
国家重点研发计划资助(2024YFF0618904). （2024YFF0618904）
