High-velocity oxy-fuel and high-velocity air fuel sprayed WC-Co-Cr coatings on solution-treated 21-4N steel for slurry and corrosion resistance

Original scientific paper

Authors

  • Rajanna Lingappa Department of Mechanical Engineering, JSS Science and Technology University, Mysuru, Karnataka 570006, India https://orcid.org/0000-0002-4726-4228
  • Tumakur Gangadhar Mamatha Department of Mechanical Engineering, JSS Science and Technology University, Mysuru, Karnataka 570006, India https://orcid.org/0000-0002-4726-4228
  • Momballi Shivappadevaru Prabhuswamy 2Department of Mechanical Engineering, JSS Academy of Technical Education, Noida, Uttar Pradesh 201301, India, https://orcid.org/0009-0005-1962-6585
  • Vikrant Singh Department of Mechanical Engineering, Sant Longowal Institute of Engineering and Technology, Longowal, Sangrur-148106, Punjab, India https://orcid.org/0000-0003-4937-1032
  • Anuj Bansal Department of Mechanical Engineering, Sant Longowal Institute of Engineering and Technology, Longowal, Sangrur-148106, Punjab, India https://orcid.org/0000-0001-9641-386X

DOI:

https://doi.org/10.5599/jese.2246

Keywords:

Slurry jet erosion test, Electrochemical corrosion test, surface modification
Graphical Abstract

Abstract

This study aims to fabricate WC-Co-Cr coatings on the solution-treated 21-4N steel utilizing high-velocity oxy-fuel (HVOF) and high-velocity air fuel (HVAF) techniques. The microstructure, hardness, surface quality, porosity, slurry erosion, and corrosion resistance of HVOF and HVAF coatings on solution-treated 21-4N steel were investigated and compared. The HVAF sprayed WC-Co-Cr coating exhibited dense structure, more hardness (1582 HV), greater fracture toughness (5.69 MPa m1/2), less decarburization, and lower porosity (0.97 %) as compared to HVOF sprayed coating. Further, slurry jet erosion tests and electrochemical corrosion tests provide a comprehensive evaluation of the coating’s performance under erosive and corrosive conditions. Eventually, the conclusive results of the study affirm the exceptional performance of the high-velocity air fuel sprayed WC-Co-Cr coating, demonstrating its superiority in both erosion and corrosion resistance compared to the high-velocity oxygen fuel sprayed coating.

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References

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Published

23-04-2024 — Updated on 23-04-2024

How to Cite

Lingappa, R., Mamatha, T. G., Prabhuswamy, M. S., Singh, V., & Bansal, A. (2024). High-velocity oxy-fuel and high-velocity air fuel sprayed WC-Co-Cr coatings on solution-treated 21-4N steel for slurry and corrosion resistance: Original scientific paper. Journal of Electrochemical Science and Engineering, 14(4), 499–522. https://doi.org/10.5599/jese.2246

Issue

Vol. 14 No. 4 (2024)

Section

Advanced coatings

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