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<p>The present study examines the corrosion and mechanical properties of non-equiatomic high-entropy alloy (HEA) coatings with compositions Fe43Mo15Cr12Ni10B7WC13 (A), Fe43Mo15Cr12Ni10B11WC9 (B), and Fe43Mo15Cr12Ni10B15WC5 (C) laser-cladded onto SS316L substrates. Hardness and tensile studies revealed composition B had the highest hardness value (245 HV), followed by compositions A (216 HV) and C (210.3 HV). Microstructural studies by scanning electron microscopy (SEM) revealed the presence of shear cracks across boundaries, resulting from the plastic deformation due to friction. Abrasion tests showed that composition A has better scratch resistance than the other two compositions. Corrosion studies conducted in a 1&#xa0;M NaCl solution with an Ag/AgCl reference electrode indicated that composition B showed the best results, with the lowest I<sub>corr</sub> (3.77 µA) and relatively higher E<sub>corr</sub> and polarization resistance (R<sub>p</sub>), suggesting improved corrosion resistance. Oxides and crystalline phases formed by the interaction of several elements in the laser-cladding deposits enhanced wear and corrosion resistance. In summary, coating composition B offered the best combination of high hardness and improved corrosion resistance, making it the most promising coating for future surface engineering.</p>

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Mechanical and Corrosion Behavior of SS316L Coated with Non-Equiatomic High Entropy Alloys

  • 期刊论文

  • 发表日期：

    2026年7月23日

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  • Piyush Mahendru,
  • Pradeep Kumar Mouria,
  • Gianender Kajal,
  • Husain Mehdi,
  • Jai Prakash Sharma

摘要

The present study examines the corrosion and mechanical properties of non-equiatomic high-entropy alloy (HEA) coatings with compositions Fe43Mo15Cr12Ni10B7WC13 (A), Fe43Mo15Cr12Ni10B11WC9 (B), and Fe43Mo15Cr12Ni10B15WC5 (C) laser-cladded onto SS316L substrates. Hardness and tensile studies revealed composition B had the highest hardness value (245 HV), followed by compositions A (216 HV) and C (210.3 HV). Microstructural studies by scanning electron microscopy (SEM) revealed the presence of shear cracks across boundaries, resulting from the plastic deformation due to friction. Abrasion tests showed that composition A has better scratch resistance than the other two compositions. Corrosion studies conducted in a 1 M NaCl solution with an Ag/AgCl reference electrode indicated that composition B showed the best results, with the lowest Icorr (3.77 µA) and relatively higher Ecorr and polarization resistance (Rp), suggesting improved corrosion resistance. Oxides and crystalline phases formed by the interaction of several elements in the laser-cladding deposits enhanced wear and corrosion resistance. In summary, coating composition B offered the best combination of high hardness and improved corrosion resistance, making it the most promising coating for future surface engineering.