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<p>This study investigates the brittle fracture of mist eliminator filters constructed from 304L stainless steel sheets, focusing on the underlying mechanisms of failure. Through a combination of visual inspections, structural assessments, mechanical testing, and fractographic analysis, we identified hydrogen embrittlement as the primary cause of failure following spot welding. Our detailed examination revealed that copper contamination in the weld and heat-affected zone (HAZ) significantly contributed to this embrittlement. Additionally, elevated levels of H2S in the gas stream exacerbated the susceptibility of the welded areas, leading to premature fractures. To mitigate these issues, we recommend stringent control of H<sub>2</sub>S concentrations in incoming gases and implementing stress relief annealing post-welding during filter manufacturing.</p>

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Hydrogen-Induced Failure Mechanisms in 304L Stainless Steel Filters: A Detailed Analysis

  • 期刊论文

  • 发表日期：

    2025年5月10日

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  • Navid Saeidi,
  • Fakhreddin Ashrafizadeh,
  • Masoud Karimpour,
  • Iman Soleimani

摘要

This study investigates the brittle fracture of mist eliminator filters constructed from 304L stainless steel sheets, focusing on the underlying mechanisms of failure. Through a combination of visual inspections, structural assessments, mechanical testing, and fractographic analysis, we identified hydrogen embrittlement as the primary cause of failure following spot welding. Our detailed examination revealed that copper contamination in the weld and heat-affected zone (HAZ) significantly contributed to this embrittlement. Additionally, elevated levels of H2S in the gas stream exacerbated the susceptibility of the welded areas, leading to premature fractures. To mitigate these issues, we recommend stringent control of H2S concentrations in incoming gases and implementing stress relief annealing post-welding during filter manufacturing.