换热器波纹管的腐蚀失效原因
Corrosion Failure Reason of Bellows of Heat Exchanger
摘 要
某公司管壳式换热器,运行不到2个月就发生严重泄漏现象,波纹管多处出现孔洞和裂纹。现场截取泄漏波纹管管段,采用形貌观察、化学成分分析、金相检验和能谱分析等分析了波纹管的合金成分、组织结构和腐蚀产物特征,综合服役环境和材料特征两方面的信息,对泄漏原因进行了剖析和讨论。结果表明:波纹管发生泄漏起源于管内壁,管材组织中夹杂物过多是造成波纹管的耐蚀性减弱,诱发点蚀,进而穿孔的主要原因。
失效分析
夹杂物
穿孔
裂纹
bellow
failure analysis
inclusions
holes
crack
Abstract
A certain company's shell and tube heat exchanger experienced severe leakage within less than 2 months of operation, with multiple holes and cracks appearing in the bellow. The section of the leaking bellow was intercepted on site, and the alloy composition, microstructure, and corrosion product characteristics of the bellow were analyzed using morphology observation, chemical composition analysis, metallographic examination, and energy spectrum analysis. Based on the comprehensive information of the service environment and material characteristics, the cause of the leakage was analyzed and discussed. The results indicated that the leakage of the bellow originated from the inner wall of the pipe, and the excessive inclusion in the pipe tissue was the main reason for the weakening of the corrosion resistance of the bellow, inducing pitting corrosion, and ultimately perforation.
中图分类号 TG174.4 DOI 10.11973/fsyfh-202310020
所属栏目 失效分析
基金项目
收稿日期 2023/4/12
修改稿日期
网络出版日期
作者单位点击查看
联系人作者胡红祥(hxhu@imr.ac.cn)
引用该论文: QIU Shi,LI Donghao,HU Hongxiang,MA Aili,NIU Cong. Corrosion Failure Reason of Bellows of Heat Exchanger[J]. Corrosion & Protection, 2023, 44(10): 106
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【9】唐行辉,张学超,澹台金耒,等.某柴油发动机增压器回油管开裂失效分析及改进措施[J].内燃机与配件,2022(12):55-59.
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