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Investigations on Slurry Erosive on Wear Performance of HVOF-Sprayed Cr2O3 Coatings on Aluminum Alloy

Abstract

The slurry erosion behavior of thermally sprayed Cr2O3 coatings on Aluminium alloy is evaluated in the current research. By employing a high-velocity oxy-fuel (HVOF) spraying process, Cr2O3 coatings were deposited on the Aluminium 6061 alloy. Microhardness, as well as microstructure of the coatings, were explored to analyze the developed coatings. Slurry erosive wear experiments have been conducted by varying the conditions of the slurry erosion process, such as test duration, slurry concentration, slurry speed, and size of impinging particles, on the erosion test rig. The outcome has shown that with an increase in slurry concentration, slurry speed, and impinging particle size, the slurry erosive wear loss increases. By utilizing 3D confocal microscopy and scanning electron microscopy, the wear mechanisms of uncoated and Cr2O3-coated samples have been examined.

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Acknowledgements

The authors wish to acknowledge their sincere thanks to the management of CHRIST (Deemed to be University), Bangalore, India, for sponsoring this research work under Minor Research Project (Project No: MRP MNG-19). The authors would like to express their deep sense of gratitude to Dr.Iven Jose, Dean, School of Engineering and Technology, CHRIST (Deemed to be University), Bengaluru, India. The authors wish to thank Dr.R.Keshavamurthy, Professor, Department of Mechanical Engineering, Dayananda Sagar College of Engineering, Bangalore, INDIA, for his technical discussion and suggestions on preparing the manuscript.

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Correspondence to G. S. Pradeep Kumar.

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Kumar, G.S.P., Shinde, A., Yadav, Y. et al. Investigations on Slurry Erosive on Wear Performance of HVOF-Sprayed Cr2O3 Coatings on Aluminum Alloy. J Bio Tribo Corros 7, 106 (2021). https://doi.org/10.1007/s40735-021-00543-2

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  • DOI: https://doi.org/10.1007/s40735-021-00543-2

Keywords

  • HVOF
  • Al6061 alloy
  • Cr2O3
  • Slurry erosion test