某新建小区住宅楼给水管道发生断裂。采用宏、微观检验、材质化学成分分析、力学性能比较及扫描电镜、能谱仪测定等方法对断裂件进行分析。结果表明,因用材错误,在水介质作用下,金属发生晶界腐蚀及显微组织变化,最终引起性能恶化而断裂失效。

In a new building,water supply pipe was broke. The broken part was analyzed by macroscopic and microscopic examination,chemical analysis,comparison of mechanical properties and so on. The result showed that fracture failure was caused by using wrong material and grain-boundary corrosion and micro structure change in the affect of mediator,that made the properties of metal worsen and result in fracture failure.