254SMO超级奥氏体不锈钢换热板片的腐蚀失效原因
Corrosion Failure Reason of 254SMO Super Austenitic Stainless Steel Heat Exchange Plate
倪吉旭 1雷沙沙 1苏厚德 2谢哲蓉 1赵昕 3席钶沣4
作者信息
- 1. 甘肃蓝科石化高新装备股份有限公司,兰州 730050
- 2. 甘肃蓝科石化高新装备股份有限公司,兰州 730050;上海蓝滨石化设备有限责任公司,上海 201518
- 3. 上海蓝滨石化设备有限责任公司,上海 201518
- 4. 中石油西南油气田分公司重点项目部,成都 610000
- 折叠
摘要
某煤化工厂用于废水处理项目的换热板片(材质254SMO)使用约半年就发生了腐蚀失效.对该厂废水水质进行了分析,并对该换热板片进行了宏观检查、成分分析、金相分析、扫描电镜分析和能谱分析.结果表明:废水介质的含盐量高、污染物种类繁多、介质温度较高,形成了特殊腐蚀环境,且换热板片的密封圈会形成缝隙结构,由换热板片所处的介质环境和自身结构导致该板片发生点蚀和缝隙腐蚀,随着腐蚀的进行,最终造成254SMO超级奥氏体不锈钢换热板片失效泄漏.建议通过添加缓蚀剂和升级换热板材质等加强防护.
Abstract
The heat exchange plate(steel 254SMO)used in a wastewater treatment project at a certain coal chemical plant had undergone corrosion failure after about half a year of service.The wastewater quality of the factory was analyzed,and the heat exchange plate was subjected to macroscopic examination,composition analysis,metallographic analysis,scanning electron microscopy analysis,and energy spectrum analysis.The results show that the wastewater medium had a high salt content,a wide variety of pollutants,and a high medium temperature,forming a special corrosive environment.The sealing ring of the heat exchange plate would form a gap structure,which was caused by the medium environment and its own structure of the heat exchange plate.As the corrosion progresses,it ultimately led to the failure and leakage of the 254SMO super austenitic stainless steel heat exchange plate.It was recommended to strengthen the protection of the system by adding corrosion inhibitors and upgrading the material of the heat exchange plate.
关键词
254SMO不锈钢/换热板片/腐蚀/失效分析Key words
254SMO stainless steel/plate of heat exchanger/corrosion/failure analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据