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. The explosion of the water wall of No.5 boiler in a thermal power plant was carried out.The macro-observation, chemical analysis, metallographic analysis, scanning electron microscopy and electron spectroscopy and X-ray diffraction analysis of the sampled water-cooled wall tube were carried out.The results showed that the reason of pipe explosion was water-cooled The corrosion of the wall pipe to the inner wall of the fire side occurred due to hydrogen corrosion, and measures to prevent such accidents were put forward.