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<p>This study examines the precipitation behavior of MnS in Fe–22Mn–5Al–C steel, revealing pronounced sulfur segregation at a solid fraction of 0.96 (29.51 <i>vs.</i> 1.99 for Mn). MnS preferentially nucleates on the <i>c</i> plane of AlN, exhibiting a lattice mismatch of 5.01&#xa0;pct. As the temperature increases from 25 °C to 50 °C, micro-galvanic corrosion enlarges the pit diameter from 13.93 to 19.01 <i>μ</i>m, leading to the formation of circular corrosion areas and Fe–O–Cl products.</p>

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Electrochemical Pitting Corrosion Behavior of the Steel Matrix Induced by MnS Inclusion Precipitation in Fe–22Mn–5Al–C Low-Density Steel: Effect of Temperature

  • 期刊论文

  • 发表日期：

    2025年8月8日

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  • Jinlong Wang,
  • Zhengliang Xue

摘要

This study examines the precipitation behavior of MnS in Fe–22Mn–5Al–C steel, revealing pronounced sulfur segregation at a solid fraction of 0.96 (29.51 vs. 1.99 for Mn). MnS preferentially nucleates on the c plane of AlN, exhibiting a lattice mismatch of 5.01 pct. As the temperature increases from 25 °C to 50 °C, micro-galvanic corrosion enlarges the pit diameter from 13.93 to 19.01 μm, leading to the formation of circular corrosion areas and Fe–O–Cl products.