理化检验-物理分册2026，Vol.62Issue(3)：41-44,52,5.DOI:10.11973/lhjy-wl240363
304不锈钢输送管线穿孔泄漏原因
Causes of perforation leakage of 304 stainless steel pipeline
殷瞻1
作者信息
- 1. 南京市锅炉压力容器检验研究院,南京 210019
- 折叠
摘要
Abstract
Before the 304 stainless steel water supply pipeline of a petrochemical company was restarted after 3 years of storage,the staff found that perforation and leakage occurred in many elbows during the hydraulic test.The leakage causes of the pipeline were analyzed by means of macroscopic observation,chemical composition analysis,hardness and ferrite content test,metallographic examination,scanning electron microscopy and energy spectrum analysis.The results show that the steel tube without solid solution treatment had more δ-ferrite in the microstructure,which greatly reduced the pitting corrosion resistance of the material.In addition,after the completion of the preliminary hydraulic test,the accumulated water inside the pipeline was directly sealed without being drained away,and the Cl-in the accumulated water was concentrated at the bottom of the elbow,which eventually led to pitting corrosion and perforation of the pipeline during storage.关键词
304不锈钢/固溶处理/δ铁素体/点腐蚀穿孔/氯离子腐蚀Key words
304 stainless steel/solid solution treatment/δ-ferrite/pitting perforation/chloride ion corrosion分类
矿业与冶金引用本文复制引用
殷瞻..304不锈钢输送管线穿孔泄漏原因[J].理化检验-物理分册,2026,62(3):41-44,52,5.
