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<p>Hydrogen in the pipeline leads to the degradation of mechanical properties of steel and may result in premature failure due to hydrogen embrittlement. Besides, for natural gas pipeline blended with hydrogen, the entrained fine sand arising from formation sand production induced erosion cannot be ignored. In this work, the erosion behavior of X100 pipeline steel under different hydrogen damage and strain rate is thoroughly studied by ductile damage mechanics. The results show that the erosion rate increases with the increase of hydrogen concentration and impact velocity, as the damage parameters are both strain rate and hydrogen concentration dependent, and the damage morphology transitions from ductility to brittleness. Based on the simulation results, a unified hydrogen damage–erosion predicting model is proposed, with the ductility and brittleness damage components both considered, and the particle impact velocity, impact angle, and hydrogen concentration are carefully considered.</p>

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Hydrogen Embrittlement-Accelerated Erosion Characteristics and Erosion Model Development Based on Ductile Damage Mechanics

  • 期刊论文

  • 发表日期：

    2026年4月10日

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  • Huakun Wang,
  • Tongyao Wang,
  • Heyang Chen,
  • Yang Yu

摘要

Hydrogen in the pipeline leads to the degradation of mechanical properties of steel and may result in premature failure due to hydrogen embrittlement. Besides, for natural gas pipeline blended with hydrogen, the entrained fine sand arising from formation sand production induced erosion cannot be ignored. In this work, the erosion behavior of X100 pipeline steel under different hydrogen damage and strain rate is thoroughly studied by ductile damage mechanics. The results show that the erosion rate increases with the increase of hydrogen concentration and impact velocity, as the damage parameters are both strain rate and hydrogen concentration dependent, and the damage morphology transitions from ductility to brittleness. Based on the simulation results, a unified hydrogen damage–erosion predicting model is proposed, with the ductility and brittleness damage components both considered, and the particle impact velocity, impact angle, and hydrogen concentration are carefully considered.