核电厂CFI反冲洗管泄漏原因分析  

Failure Analysis of the Stainless Steel Tube of CFI System

作　　者：关矞心[1] 

机构地区：[1]苏州热工研究院有限公司,江苏苏州215004

出　　处：《全面腐蚀控制》2016年第10期33-35,共3页Total Corrosion Control

摘　　要：某核电厂CFI系统不锈钢反冲洗管服役半年发生穿孔泄漏,针对这种情况开展了相关理化检验以分析该管线失效原因及影响因素。结果表明由于现场管道、弯管在焊接时发生敏化,焊缝未进行表面钝化处理,焊缝及热影响区耐腐蚀性能降低,因此在海水介质中发生了点蚀导致管道穿孔泄漏。A stainless steel tube o f CFI system in the first half o f the year o f service taken placeperforation and leakage in a nuclear power plant. The related physical and chemical tests were carried outto analyze the failure causes and influencing factors o f the pipeline. The results showed that due to the fieldpipes, elbows in welding the sensitization, weld without surface passivation treatment, weld and heat affectedzone decrease the corrosion resistance, so in seawater happened pitting resulting in pipeline perforationleakage.

关 键 词：点蚀 不锈钢 泄漏 

分 类 号：TG172.82[金属学及工艺—金属表面处理]