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<p>The corrosion of 316L steel fabricated by selective laser melting (SLM) and by forging has been studied at 800–900&#xa0;°C in a H<sub>2</sub>/H<sub>2</sub>S/CO<sub>2</sub> (Gas I) and a H<sub>2</sub>/CO<sub>2</sub> (Gas II) gas mixture providing the same oxygen partial&#xa0;pressure. Both steels behaved protectively in Gas II, while they suffered heavy sulfidation in Gas I, except for the SLM steel corroded at 900&#xa0;°C, probably due to a larger concentration of grain boundaries, favoring a faster diffusion of chromium to form an external chromia scale. Moreover, the fine-grained microstructure of SLM 316L showed rather good stability after 50-h performance up to 900&#xa0;°C.</p>

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The Sulfidation–Oxidation of a 316L Steel Fabricated by Selective Laser Melting in Reducing Atmospheres at 800–900 °C

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Y. J. Ren,
  • Y. T. Li,
  • M. N. Zhou,
  • L. Mandora,
  • M. Vanazzi,
  • Z. Y. Sun,
  • T. J. Pan,
  • Y. Niu

摘要

The corrosion of 316L steel fabricated by selective laser melting (SLM) and by forging has been studied at 800–900 °C in a H2/H2S/CO2 (Gas I) and a H2/CO2 (Gas II) gas mixture providing the same oxygen partial pressure. Both steels behaved protectively in Gas II, while they suffered heavy sulfidation in Gas I, except for the SLM steel corroded at 900 °C, probably due to a larger concentration of grain boundaries, favoring a faster diffusion of chromium to form an external chromia scale. Moreover, the fine-grained microstructure of SLM 316L showed rather good stability after 50-h performance up to 900 °C.