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<p>Electrodeposited Ni-W alloy coatings are gaining importance as a suitable candidate for chrome plating due to its excellent hardness and corrosion resistance. The application of these Ni-W coatings under high-speed sliding requires appropriate study. In this work, the sliding wear behavior as a function of sliding velocity (0.67-1.51&#xa0;m/s) for electrodeposited Ni-W deposited utilizing alkaline electrolyte and hard chrome (HCr) coatings was studied using pin-on-disk configuration. Ni-W coating demonstrated ~ 43% lower wear rate at 1.51&#xa0;m/s sliding velocity as compared to HCr. Ni-W coatings did not show much wear rate dependence on sliding velocity whereas wear rate decreased with increase in velocity for HCr coatings. Abrasive wear mechanism was predominant in Ni-W whereas in HCr coatings, wear takes place by delamination and abrasion. Raman spectroscopy analysis of worn surface suggested presence of predominant NiWO<sub>4</sub> + WO<sub>3</sub> and Cr<sub>2</sub>O<sub>3</sub> oxide for Ni-W and HCr coatings, respectively. Irrespective of sliding velocity, Ni-W illustrated lower wear rates than HCr coatings despite having relatively lower hardness. The results were rationalized based on wear-induced subsurface hardening and composition of worn surface oxide film.</p>

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Influence of Sliding Velocity on Wear Behavior of Electrodeposited Ni-W and Hard Chrome Coatings on Gun Barrel Steel

  • 期刊论文

  • 发表日期：

    2025年5月12日

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  • A. Raju,
  • A. Veeresh Babu,
  • B. Praveen Kumar,
  • Kaustubh Prabhu,
  • B. V. Sarada,
  • L. Rama Krishna,
  • Nitin P. Wasekar

摘要

Electrodeposited Ni-W alloy coatings are gaining importance as a suitable candidate for chrome plating due to its excellent hardness and corrosion resistance. The application of these Ni-W coatings under high-speed sliding requires appropriate study. In this work, the sliding wear behavior as a function of sliding velocity (0.67-1.51 m/s) for electrodeposited Ni-W deposited utilizing alkaline electrolyte and hard chrome (HCr) coatings was studied using pin-on-disk configuration. Ni-W coating demonstrated ~ 43% lower wear rate at 1.51 m/s sliding velocity as compared to HCr. Ni-W coatings did not show much wear rate dependence on sliding velocity whereas wear rate decreased with increase in velocity for HCr coatings. Abrasive wear mechanism was predominant in Ni-W whereas in HCr coatings, wear takes place by delamination and abrasion. Raman spectroscopy analysis of worn surface suggested presence of predominant NiWO4 + WO3 and Cr2O3 oxide for Ni-W and HCr coatings, respectively. Irrespective of sliding velocity, Ni-W illustrated lower wear rates than HCr coatings despite having relatively lower hardness. The results were rationalized based on wear-induced subsurface hardening and composition of worn surface oxide film.