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<p>Siliconized layer was prepared on SUS403 stainless steel using molten salt method. The microstructure, wear and electrochemical properties of the siliconized layer were investigated. The results show that the growth activation energy of the siliconized layer is approximately 93.5&#xa0;kJ/mol. The siliconized layer exhibits spinel-like grains, while the cross-sectional morphology displays a columnar structure. The siliconized layer is mainly composed of Fe<sub>3</sub>Si and Fe<sub>2</sub>Si. The microhardness and wear resistance of the siliconized layer has increased by 87% and 64% compared to the substrate, respectively. Electrochemical results indicate that the corrosion resistance of the siliconized sample to 10&#xa0;vol% H<sub>2</sub>SO<sub>4</sub> aqueous solutions has significantly improved. However, an opposite result was observed in 3.5&#xa0;wt% NaCl aqueous solutions. Analysis of the salt spray test indicated that the reduced corrosion resistance of the siliconized sample to NaCl solution was mainly related to the penetrating cracks in the siliconized layer and the crevice corrosion effect of Cl<sup>−</sup>.</p>

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Study on the Structure, Wear Resistance and Corrosion Resistance of Siliconized Layer Prepared on Stainless Steel Surface by Molten Salt Method

  • 期刊论文

  • 发表日期：

    2025年11月17日

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  • Lin Li,
  • Hongyuan Fan,
  • Jun Xiao,
  • Guang Xian,
  • Lijun Xian,
  • Yingzhi Luo,
  • Ke Zhao,
  • Jiahao Jiao,
  • Yang Shen,
  • Gaohong Xu,
  • Yuqi Pang

摘要

Siliconized layer was prepared on SUS403 stainless steel using molten salt method. The microstructure, wear and electrochemical properties of the siliconized layer were investigated. The results show that the growth activation energy of the siliconized layer is approximately 93.5 kJ/mol. The siliconized layer exhibits spinel-like grains, while the cross-sectional morphology displays a columnar structure. The siliconized layer is mainly composed of Fe3Si and Fe2Si. The microhardness and wear resistance of the siliconized layer has increased by 87% and 64% compared to the substrate, respectively. Electrochemical results indicate that the corrosion resistance of the siliconized sample to 10 vol% H2SO4 aqueous solutions has significantly improved. However, an opposite result was observed in 3.5 wt% NaCl aqueous solutions. Analysis of the salt spray test indicated that the reduced corrosion resistance of the siliconized sample to NaCl solution was mainly related to the penetrating cracks in the siliconized layer and the crevice corrosion effect of Cl−.