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<p>Corrosion stands as one of the primary causes of failures in power plant boiler heat exchange components, frequently resulting in unplanned shutdowns with substantial economic losses and increased operational costs. A tube rupture failure occurred in the water-cooled wall of a coal-fired power plant boiler, presenting a large rectangular rupture opening and numerous densely distributed corrosion pits on the inner wall surface. The failed tube sample was systematically analyzed through visual inspection, chemical composition analysis, mechanical property testing, and microstructural characterization. Experimental results conclusively identified hydrogen-induced corrosion cracking as the fundamental failure mechanism. This investigation clarifies the causative factors and mechanistic progression of hydrogen-induced damage in this case, providing valuable reference data for analogous failure scenarios in thermal power systems.</p>

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Failure Analysis of Hydrogen Corrosion and Explosion of Water-Wall Tube in a Power Plant

  • 期刊论文

  • 发表日期：

    2025年3月31日

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  • Hua He,
  • Junjie Li,
  • Zhunbei Zheng,
  • Mengyang Li,
  • Jianwei Zhang,
  • Jun Zhang,
  • Zhanjun Yang

摘要

Corrosion stands as one of the primary causes of failures in power plant boiler heat exchange components, frequently resulting in unplanned shutdowns with substantial economic losses and increased operational costs. A tube rupture failure occurred in the water-cooled wall of a coal-fired power plant boiler, presenting a large rectangular rupture opening and numerous densely distributed corrosion pits on the inner wall surface. The failed tube sample was systematically analyzed through visual inspection, chemical composition analysis, mechanical property testing, and microstructural characterization. Experimental results conclusively identified hydrogen-induced corrosion cracking as the fundamental failure mechanism. This investigation clarifies the causative factors and mechanistic progression of hydrogen-induced damage in this case, providing valuable reference data for analogous failure scenarios in thermal power systems.