Q235取水管道腐蚀穿孔原因分析  

ANALYSIS OF CORROSION PERFORATION OF PIPELINE FOR A POWER PLANT WATER

作　　者：刘斌[1] 齐公台[1] 姚杰新 郭兴蓬[1] 

机构地区：[1]华中科技大学化学系,武汉430074 [2]蒲山电厂发电营运中心,南阳473111

出　　处：《腐蚀科学与防护技术》2006年第2期141-143,共3页Corrosion Science and Protection Technology

摘　　要：用旋转挂片失重实验、电化学实验、水质分析、材质分析和腐蚀产物的XRD分析等方法,对某火电厂Q235取水管道腐蚀穿孔原因进行了分析.结果表明:天然水中溶解性杂质及腐蚀产物在管内表面的沉积形成了氧浓差电池,发展成闭塞电池后加剧了沉积物下的腐蚀,直至穿孔.The causes of corrosion perforation of a water pipeline have been studied by means of rotary coupon corrosion tests, potentiodynamic polarization, chemical analysis, X-ray diffraction （XRD） and Electron probe micro-analyzer （EPMA）. The results demonstrated that the deposit of dissolved im purities and corrosion product could form an oxygen concentration different cell, which grow into an occluded corrosion celI（OCC）. The OCC was considered to accelerate corrosion beneath deposit until the pipe perforated.

关 键 词：Q235钢管 天然水 火电厂 腐蚀穿孔 

分 类 号：TG172.9[金属学及工艺—金属表面处理]