摘要
某热电厂5号锅炉水冷壁发生爆管.对取样水冷壁管进行了宏观观察、化学分析、金相分析、扫描电镜与电子能谱分析及X射线衍射分析等.结果表明,爆管原因是水冷壁管向火侧内壁局部区域发生氢腐蚀所致.提出了预防此类事故发生的措施.
Bursting failure occurred on waterwall tubes of No.5 boiler in a power plant. Macroscop- ic inspection, chemical analysis, metallurgraphy, scanning electron microscopy （SEM）, energy dis-persive spectroscopy （EDS） and X-ray diffraction （XRD） were adopted to examine the failed tube. The results indicated that the tube rupture was resulted from localized hydrogen corrosion of the part facing fire. Preventive measures of such failures are put forward.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2012年第6期503-507,共5页
Corrosion Science and Protection Technology
关键词
水冷壁管
氢腐蚀
爆管
锅炉
20G钢
waterwall tube, hydrogen corrosion, burst, boiler, 20G steel
