Abstract
Research for alternatives of hard chrome plating has been widely carried out in the world. High-velocity oxygen-fuel (HVOF)-sprayed cermet coating is one of such alternative candidates. Depending on the cermet powder for spraying, however, sometimes the density of the sprayed coatings is not sufficient for desired corrosion resistance. A gas-shroud (GS) attachment for use with commercial HVOF, which is effective in suppressing oxidation of sprayed particles while raising the velocity of sprayed particles, has been developed. The GS-HVOF spray has been successfully applied to corrosion resistant alloys such as HastelloyC. In this study, a WC cermet system with corrosion and wear resistance was sprayed using a gas-shroud attachment. Porosity in the coatings was observed by the microscopic observation of cross sections. Corrosion and wear resistance was evaluated by alternating current corrosion monitoring in artificial seawater and abrasive wear-tester, respectively. Coatings deposited by the gas-shroud HVOF were superior in terms of both corrosion and wear resistance to coatings formed by the conventional HVOF. The density of the sprayed coatings was improved using the gas-shroud attachment, resulting in superior corrosion and wear resistance.
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B. Sartwell, K. Legg, and J. Sauer, Joint Test Report, Validation of WC/Co HVOF Thermal Spray Coatings as a Replacement for Hard Chrome Plating On Aircraft Landing Gear, Part I: Materials Testing, U.S. Department of Defense, USA, 2002.
J.G. Legoux, Replacement of Hard Chromium Electroplating Using HVOF Thermal Spray Technology, Proc. 7th Workshop on the Ultra-Steel, 2003, p 124–133
S. Kuroda, T. Fukushima, M. Sasaki, and T. Kodama, Microstructure and Corrosion Resistance of HVOF Sprayed 316L Stainless Steel and Ni Base Alloy Coatings, Thermal Spray: Surface Engineering via Applied Research, C.C. Berndt, Ed., ASM International, OH, 2000, p 455–462
W.D. Swank, J.R. Fincke, and D.C. Haggard, HVOF Particle Flow Field Characteristics, Thermal Spray Industrial Application, C.C. Berndt and S. Sampath, Ed., ASM International, 1994, p 319–324
H. Yamada, S. Kuroda, T. Fukushima, and H. Yumoto, Capture and Evaluation of HVOF Thermal Sprayed Particles by a Gel Target, Thermal Spray 2001: New Surface for a New Millennium, C.C. Berndt, K.A. Khor, and E.F. Lugscheider, Ed., ASM International, 2001, p 797–803
T. Fukushima and S. Kuroda, Oxidation of HVOF Sprayed Alloy Coatings and Its Control by a Gas Shroud, Thermal Spray 2001: New Surface for a New Millennium, C.C. Berndt, K.A. Khor, and E.F. Lugscheider, Ed., ASM International, 2001, p 527–532
J.G. Legoux, B. Arsenault, L. Leblanc, V. Bouyer, and C. Moreau, Evaluation of Four High Velocity Thermal Spray Guns Using WC-10%Co-4%Cr Cermet, J. Therm. Spray Technol, Vol 11 (No. 1) 2002, p 86–94
D. Harvey, O. Lunder, and R. Henriksen, The Development of Corrosion Resistant Coatings by HVOF Spraying, Thermal Spray: Surface Engineering via Applied Research, C.C. Berndt, Ed., ASM International, Materials 2000, p 991–997
S. Bouaricha and B.R. Marple, Phase Structure-Mechanical Property Relationships in HVOF-sprayed WC-12Co, Thermal Spray Solutions: Advances in Technology and Application, DVS (Org)
H. Czichoz, Tribology, Elsevier Scientific Publishing Co., 1978, p 115
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Ishikawa, Y., Kawakita, J., Kuroda, S. et al. Evaluation of corrosion and wear resistance of hard cermet coatings sprayed by using an improved HVOF process. J Therm Spray Tech 14, 384–390 (2005). https://doi.org/10.1361/105996305X59378
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DOI: https://doi.org/10.1361/105996305X59378