磷酸铵溶液介质中不锈钢球阀的失效分析  

Failure Analysis of Ball Valve Made of Stainless Steel in Ammonium Phosphate Solution

作　　者：邱艳丽[1] 杨振国[1] 

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《腐蚀与防护》2008年第4期216-219,共4页Corrosion & Protection

摘　　要：采用金相显微镜和扫描电镜,对在磷酸铵溶液中失效的不锈钢球阀进行了宏微观形貌观察和金相组织分析;并采用光电直读光谱仪、能谱仪、红外碳硫分析仪和NHO分析仪对球阀材质和密封部位表面沉积物进行了表征分析。结果表明,球阀的失效是由于材质不合格和环境介质的共同作用所产生的电化学腐蚀和结垢引起的。此外,分析了不锈钢材料在磷酸铵溶液中的腐蚀机理,并提出防止球阀失效的相应对策。The macro appearance,morphology and metallographic structure of ball valve which was made of stainless steel and failed in ammonium phosphate solution,were observed by metallographic microscopy and scanning electron microscopy(SEM).Also,photoelectronic direct reading spectrometer,energy dispersive spectrometer(EDS),carbon and sulfur analyzer and NHO-analyzer were also used to analyze the chemical composition of the substance and particles deposited on sealing area.The failure of ball valve was caused by ele...

关 键 词：球阀 不锈钢 失效分析 磷酸铵溶液 晶间腐蚀 结垢 

分 类 号：TG172[金属学及工艺—金属表面处理]