采用化学成分分析、金相检验、扫描电镜及X射线能谱分析等方法，对不锈钢丝网断裂原因进行了分析。结果表明，应力腐蚀及点腐蚀是引起不锈钢丝网断裂的主要原因，腐蚀介质为临海潮湿大气中的氯离子。断裂丝网材质较差，其化学成分不符合相关技术条件，铬、镍含量偏低，锰含量偏高均使1Cr18Ni9钢抗腐蚀性能下降，其显微组织中出现的较多弥散碳化物颗粒及铁素体大大降低了网丝的抗应力腐蚀和点腐蚀的性能。

In this paper, chemical composition analysis, metallography, SEM and EDS methods were used to analysis the fracture failure of stainless mesh, the result showed that the fracture is caused by stress corrosion and pitting corrosion. The corrosion medium is chloride ion which is full in the damp atmosphere near the sea. The materials quality of the fracture stainless mesh was poor and the mesh chemical composition doesn′t meet the relative technical requirements, the contents of Cr and Ni are lower, however, the content of Mn is higher. All of these cause the stainless mesh failure in resistant to corrosion. The microscopic struture appears that a lot of dispersion carbide particles and ferrite blocks which greatly reduce the stainless mesh′s ability to resist stress corrosion and pitting corrosion.