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<p>The corrosion behavior of 304LN austenitic stainless steel in supercritical CO<sub>2</sub> at 650&#xa0;°C was investigated. The results show that 304LN follows Wagner’s law kinetics, forming a protective oxide film consisting of SiO<sub>2</sub>, (Cr, Mn)<sub>3</sub>O<sub>4</sub>, and Cr<sub>2</sub>O<sub>3</sub> from the inner to outer layers. A shallow carburization depth of approximately 130&#xa0;nm indicates excellent resistance to carburization. The roles of key elements in 18/8 austenitic stainless steel represented by 304LN, such as Cr, Ni, and Si, were analyzed, highlighting their contributions to anti-carburization performance and corrosion resistance under harsh conditions.</p>

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Corrosion Behavior of 304LN Stainless Steel in High-Temperature Supercritical Carbon Dioxide: Oxidation and Carburization

  • 期刊论文

  • 发表日期：

    2025年6月16日

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  • Nanfu Li,
  • Bin Wu,
  • Jiazhen Wang,
  • Ming Shu,
  • Yusheng Zhang,
  • Yifeng Li,
  • Jianqiu Wang,
  • En-Hou Han,
  • Hongliang Ming

摘要

The corrosion behavior of 304LN austenitic stainless steel in supercritical CO2 at 650 °C was investigated. The results show that 304LN follows Wagner’s law kinetics, forming a protective oxide film consisting of SiO2, (Cr, Mn)3O4, and Cr2O3 from the inner to outer layers. A shallow carburization depth of approximately 130 nm indicates excellent resistance to carburization. The roles of key elements in 18/8 austenitic stainless steel represented by 304LN, such as Cr, Ni, and Si, were analyzed, highlighting their contributions to anti-carburization performance and corrosion resistance under harsh conditions.