摘要
采用金相显微镜和扫描电镜对在碱性介质中发生泄漏的不锈钢旋塞阀进行了宏微观形貌和金相组织分析;并采用光电直读光谱仪、EDS、红外碳硫分析仪和NHO分析仪对旋塞阀材质和表面沉积物进行了系统的表征分析。结果表明旋塞阀的失效模式为腐蚀磨损和磨粒磨损。阀门塞子材质与设计规定不符以及塞子材料抗腐蚀性能降低是旋塞阀泄漏的主要原因。提出了解决问题的相应对策,为防止类似事故的再次发生提供了技术依据。
The macro appearance, morphology and metallographic structure of plug valve made of stainless steel and leaked in alkali solution were observed by metallurgical microscope and Scanning Electron Microscope（SEM）. Also, photoelectric direct reading spectrometer, Energy Dispersive Spectrometer（EDS）, carbon and sulfur analyzer and NHO-analyzer were used to analyze chemical composition of materials and substances deposited on sealing area. The results showed that the failure of stopcock was corrosive wear and abrasive wear. The main cause leak of stopcock was that the selected plug material was not in accordance with the design and thus reduced properties of its anti-corrosion. Moreover, countermeasures for solving the problem have been tentatively put forward,and the analysis results provided the technological support to prevent the same accident.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2008年第6期60-63,共4页
Journal of Materials Engineering
关键词
旋塞阀
失效分析
腐蚀磨损
磨粒磨损
stopcock
failure analysis
corrosive wear
abrasive wear
