铜合金截止阀密封失效原因分析  

Failure Analysis of Copper Alloy Globe Valve

作　　者：韩茂盛[1] 罗皓[1] 刘乐乐 张云浩[1,2] 潘恒沛 HAN Maosheng;LUO Hao;LIU Lele;ZHANG Yunhao;PAN Hengpei(Luoyang Ship Material Research Institute,Luoyang 471023,China;National New Material Production and Application Demonstration Platform(Advanced Marine Engineering and High-tech Ship Materials),Luoyang 471023,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023 [2]国家新材料生产应用示范平台(先进海工与高技术船舶材料),河南洛阳471023

出　　处：《材料开发与应用》2021年第2期49-54,共6页Development and Application of Materials

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。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.

关 键 词：海水管路 阀门 腐蚀 失效分析 

分 类 号：TG172[金属学及工艺—金属表面处理]