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Influence of Grit Blasting on the Roughness and the Bond Strength of Detonation Sprayed Coating

Abstract

The process of roughening the surfaces by grit blasting prior to coating them using thermal spray techniques is very important to obtain consistently high tensile bond strength between the coating and the substrate. The available literature on the influence of grit-blasting parameters in the case of detonation spray or HVOF coatings is quite limited. The present study aims to study the influence of grit-blasting pressure and alumina grit size on the roughening of the mild steel substrate, the resulting effect on the roughness of Cu, Al2O3, and WC-12Co coatings deposited by detonation spray coating and also on the tensile bond strengths of these coatings. Toward the above purpose, the velocity of the alumina grits have been experimentally measured using a high-speed imaging system and the tensile bond strength of the coatings have been experimentally obtained using the pin type test. The results from the above experiments point to the importance of not only the roughness of the grit-blasted mild steel substrate but also the roughness of the coatings subsequently deposited in determining the magnitude of the bond strength.

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References

  1. 1.

    M.F. Bahbou, P. Nylen, and J. Wigren, Effect of Grit Blasting and Spraying Angle on the Adhesion Strength of a Plasma Sprayed Coating, J. Therm. Spray Technol., 2006, 13(4), p 508-514

    Article  ADS  Google Scholar 

  2. 2.

    J. Day, X. Huang, and N.L. Richards, Examination of a Grit Blasting Process for Thermal Spraying using Statistical Methods, J. Therm. Spray Technol., 2005, 14(4), p 471-479

    Article  ADS  Google Scholar 

  3. 3.

    M. Mellali, A. Grimaud, A.C. Leger, P. Fauchais, and J. Lu, Alumina Grit Blasting Parameters for Surface Preparation in the Plasma Spraying Operation, J. Therm. Spray Technol., 1997, 6(2), p 217-227

    Article  CAS  ADS  Google Scholar 

  4. 4.

    S. Amada, T. Hirose, and T. Senda, Quantitative Evaluation of Residual Grits Under Angled Blasting, Surf. Coat. Technol., 1999, 1, p 1-9

    Article  Google Scholar 

  5. 5.

    S. Amada and T. Hirose, Influence of Grit Blasting Pre-Treatment on the Adhesion Strength of Plasma Sprayed Coatings: Fractal Analysis of Roughness, Surf. Coat. Tech., 1998, 102, p 132-137

    Article  CAS  Google Scholar 

  6. 6.

    Z. Mohammadi, A.A. Ziaei-Moayyed, and A. Sheikh-Mehdi Mesgar, Grit Blasting of Ti-6Al-4V Alloy: Optimisation and its Effect on Adhesion Strength of Plasma Sprayed Hydroxyapatite Coatings, J. Mater. Proc. Tech., 2007, 194, p 15-23

    Article  CAS  Google Scholar 

  7. 7.

    T. Maruyama and T. Kobayashi, Influence of Substrate Surface Roughness on Adhesive Property of Sprayed Coating, International Thermal Spray Conference, May 10-12, 2004 (Osaka, Japan), ASM International, 2004, p 266-271

  8. 8.

    K. Poorna Chander, M. Vashista, K. Sabiruddin, S. Paul, and P.P. Bandhopadhyay, Effect of Grit Blasting on Surface Properties of Steel Substrates, Mater. Des., 2009, 30, p 2895-2902

    CAS  Google Scholar 

  9. 9.

    M.H. Staia, E. Ramos, A. Carrasquero, A. Roman, J. Lesage, D. Chicot, and G. Mesmacque, Effect of Substrate Roughness Induced by Grit Blasting upon Adhesion of WC-17%Co Thermal Sprayed Coatings, Thin Solid Films, 2000, 377-378, p 657-664

    Article  CAS  ADS  Google Scholar 

  10. 10.

    S. Osawa, T. Isukaichi, J. Gifu, and R. Ahmed, Influence of Substrate Properties on the Impact Resistance of WC Cermet Coatings, International Thermal Spray Conference, May 10-12, 2004 (Osaka, Japan), ASM International, 2004, p 492-497

  11. 11.

    I. Hofinger, K. Raab, J. Moller, and M. Bobeth, Effect of Substrate Surface Roughness on the Adherence of NiCrAlY Thermal Spray Coatings, J. Therm. Spray Technol., 2002, 11(3), p 387-392

    Article  CAS  ADS  Google Scholar 

  12. 12.

    N. Mellali, P. Fauchais, and A. Grimaud, Influence of Substrate Roughness and Temperature on Alumina coatings Adhesion-Cohesion, Surf. Coat. Technol., 1996, 81(2-3), p 275-286

    Article  CAS  Google Scholar 

  13. 13.

    P. Sudharshan Phani, V. Vishnukanthan, S.V. Joshi, and G. Sundararajan, Optical Diagnostics Study of Gas Particle Transport Phenomena in Cold Gas Dynamic Spraying, J. Therm. Spray Technol., 2008, 17, p 551-563

    Article  Google Scholar 

  14. 14.

    V. Kadyrov, M. Yakovlov, D. Sen, D. Srinivasa Rao, K.P. Rao, and A.V. Saibaba, Detonation Coating Process, Trans. PMAI, 1993, 20, p 1-5

    Article  CAS  Google Scholar 

  15. 15.

    P. Saravanan, V. Selvarajan, D.S. Rao, S.V. Joshi, and G. Sundararajan, Influence of Process Variables on the Quality of Detonation Sprayed Alumina Coatings, Surf. Coat. Technol., 2000, 123, p 44-54

    Article  CAS  Google Scholar 

  16. 16.

    G. Sivakumar, L. Ramakrishna, V. Jain, D. Srinivasa Rao, G. Sundararajan, and G. Madhusudhan Reddy, The Influence of the Process Parameters on the Properties of Detonation Sprayed WC-12%Co Coatings, Thermal Spray 2001: New Surfaces for New Millennium, C.C. Berndt, K.A. Khor, and E.F. Lugscheider, Ed., May 28-30, 2001 (Singapore), ASM International, p 1031

  17. 17.

    G. Sundararajan and P. Suresh Babu, Detonation Sprayed WC-Co Coatings: Unique Aspects of their Structure and Mechanical Behaviour, Trans. IIM, 2009, 62(2), p 95-103

    CAS  Google Scholar 

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Acknowledgments

The authors wish to thank Director, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad for granting permission to publish this paper.

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Correspondence to G. Sundararajan.

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Sen, D., Chavan, N.M., Rao, D.S. et al. Influence of Grit Blasting on the Roughness and the Bond Strength of Detonation Sprayed Coating. J Therm Spray Tech 19, 805–815 (2010). https://doi.org/10.1007/s11666-010-9476-1

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Keywords

  • alumina grit velocity
  • coating roughness
  • detonation spray coatings
  • grit blasting
  • substrate roughness
  • tensile bond strength of coatings