理化检验-物理分册2026，Vol.62Issue(8)：1-4,4.DOI:10.11973/lhjy-wl260092
双相不锈钢加药泵叶轮腐蚀的原因
Reasons for corrosion of impeller in duplex stainless steel dosing pump
杨添 1陶钧 1赵传礼 1张云乾 1唐耀波1
作者信息
- 1. 中核运维技术有限公司,杭州 311200
- 折叠
摘要
Abstract
Severe corrosion occurred on the impeller of the impact dosing pump in a certain power plant.The reasons for the corrosion of the impeller were analyzed using macroscopic observation,chemical composition analysis,metallographic examination,mechanical property testing,scanning electron microscopy and energy spectrum analysis.The results show that the chemical composition and elongation after fracture of the impeller did not meet the standard requirements,and there were a large number of σ segregation phases in the microstructure,which resulted in a significant decrease in the corrosion resistance of the material and poor toughness.At the same time,the corrosion rate of the impeller material was 3.9 times that of 304 stainless steel.The impeller operated in a chlorine containing medium for a long time,and the grain boundary position of the material became the source of pitting corrosion.Corrosion developed along the depth,ultimately causing impeller corrosion.关键词
双相不锈钢/叶轮/σ相/腐蚀/显微组织Key words
duplex stainless steel/impeller/σ phase/corrosion/microstructure分类
通用工业技术引用本文复制引用
杨添,陶钧,赵传礼,张云乾,唐耀波..双相不锈钢加药泵叶轮腐蚀的原因[J].理化检验-物理分册,2026,62(8):1-4,4.
