铜合金截止阀密封失效原因分析

详细信息

Failure Analysis of Copper Alloy Globe Valve

1. Luoyang Ship Material Research Institute, Luoyang 471023, China;
2. National New Material Production and Application Demonstration Platform(Advanced Marine Engineering and High-tech Ship Materials), Luoyang 471023, China

摘要: 通过化学成分检测、室温力学性能分析以及金相组织观察、形貌观察、腐蚀产物分析等方法，分析了铜合金截止阀阀瓣密封腐蚀的原因。结果表明，截止阀阀瓣成分、组织及性能均满足标准要求，截止阀阀瓣密封面腐蚀由脱成分腐蚀、冲刷以及缝隙腐蚀的共同作用造成，管路海水泥沙较多促进了缝隙的出现并增加冲刷力度，加速腐蚀过程。
- 海水管路 /
- 阀门 /
- 腐蚀 /
- 失效分析
Abstract: The causes of titanium alloy valve corrosion were analyzed by means of chemical composition, mechanical property analysis, metallographic structure observation, macro and micro morphology observation and corrosion products analysis. The results showed that the composition and structure of globe valve disc could meet the design requirements. Corrosion on sealing surface of globe valve disc was caused by the combined action of decomposition corrosion, erosion and crevice corrosion. Large amount of seawater and sediment in pipelines could promote the appearance of crevices and increase the scouring intensity, which would accelerate the corrosion process.
- seawater pipe /
- valve /
- corrosion /
- failure analysis

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