ABSTRACT Thermal spraying has emerged as a suitable and effective surface engineering technology and is
widely used to apply wear, erosion and corrosion protective coatings for various kinds of
industrial applications. Cr3C2-based coatings have been applied to a wide range of industrial
components. Cr3C2-NiCr coatings offer greater corrosion and oxidation resistance, also having
a high melting point and maintaining high hardness, strength and wear resistance up to a
maximum operating temperature of 900 °C. The corrosion resistance is provided by NiCr matrix
while the wear resistance is mainly due to the carbide ceramic phase. This paper reviews the
performance, developments and applications of Cr3C2-NiCr thermal spray coatings for
corrosion/erosion-corrosion under different types of environments and outlines the
characterization of Cr3C2-NiCr coatings with respect to their microstructure and mechanical
properties, together with some brief characterisation work by the author for HVOF sprayed
75Cr3C2-25NiCr coating on T91 boiler steel.
Cite this paper
S. Chatha, H. Sidhu and B. Sidhu, "Characterisation and Corrosion-Erosion Behaviour of Carbide based Thermal Spray Coatings," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 6, 2012, pp. 569-586. doi: 10.4236/jmmce.2012.116041.
 Sidhu TS, Malik A, Prakash S, Agrawal RD. Oxidation and Hot Corrosion Resistance of
HVOF WC-NiCrFeSiB Coating on Ni- and Fe-based Superalloys at 800 °C. J. Therm.
Spray Technol. 2007; 16(5-6); 844-849.
Mahesh RA, Jayaganthan R, Prakash S. Evaluation of hot corrosion behaviour of HVOF
sprayed NiCrAl coating on superalloys at 900°C. Mater. Chem. Phys. 2008; 111; 524–533.
Kamal S, Jayaganthan R, Prakash S. Evaluation of cyclic hot corrosion behaviour of
detonation gun sprayed Cr3C2–25%NiCr coatings on nickel- and iron-based superalloys.
Surf. Coat. Technol. 2009; 203; 1004–1013.
Sidhu TS, Prakash S, Agrawal RD. Hot corrosion performance of a NiCr coated Ni-based
alloy. Scripta Mater. 2006; 55; 179–182.
Poza P, Gran PS. Microstructure evolution of vacuum plasma sprayed CoNiCrAlY coatings
after heat treatment and isothermal oxidation. Surf. Coat. Technol. 2006; 201; 2887–2896.
Sidhu HS, Sidhu BS, Prakash S. Mechanical and microstructural properties of HVOF
sprayed WC–Co and Cr3C2–NiCr coatings on the boiler tube steels using LPG as the fuel
gas. J. Mater. Process. Technol. 2006; 171; 77–82.
Miranda JC, Ramalho A. Abrasion resistance of thermal sprayed composite coatings with a
nickel alloy matrix and a WC hard phase. Effect of deposition technique and re-melting.
Tribol. Lett. 2001;11(1);37-48.
Khanna AS, Kumari S, Kanungo S, Gasser A. Hard coatings based on thermal spray and
laser cladding. Int. J. of Refract. Met. H. 2009; 27; 485–491.
Roy M, Pauschitz A, Polak R, Franek F. Comparative evaluation of ambient temperature
friction behaviour of thermal sprayed Cr3C2–25(Ni20Cr) coatings with conventional and
nano-crystalline grains. Trib. Int. 2006; 39; 29–38.
Crawmer DE. Introduction to coatings, equipment and theory. In: Davis JR, editor. Hand
book of thermal spray technology, ASM International, Materials Park, OH, USA; 2004; p.
Bala N, Singh H, Prakash S. High-temperature oxidation studies of cold-sprayed Ni–20Cr
and Ni–50Cr coatings on SAE 213-T22 boiler steel. Appl. Surf. Sci. 2009; 255; 6862–
Bolelli G, Cannillo V, Lusvarghi L, Montorsi M, Mantini FP, Barletta M. Microstructural
and tribological comparison of HVOF-sprayed and post-treated M–Mo–Cr–Si (M = Co,
Ni) alloy coatings. Wear 2007; 263; 1397–1416.
Tillmann W, Vogli E, Baumann I, Kopp G, Weihs C. Desirability-Based Multi-Criteria
Optimization of HVOF Spray Experiments to Manufacture Fine Structured Wear-Resistant
75 Cr3C2-25(NiCr20) Coatings. J. Therm. Spray Technol. 2010; 19(1-2); 392–408.
Guilemany JM, Ferna′ndez J, Delgado J, Benedetti AV, Climent F. Effects of thickness
coating on the electrochemical behaviour of thermal spray Cr3C2–NiCr coatings, Surf.
Coat. Technol. 2002; 153; 107–113.
Sidhu TS, Prakash S, Agrawal RD, Hot corrosion studies of HVOF sprayed Cr3C2–NiCr
and Ni–20Cr coatings on nickel-based superalloy at 900 °C. Surf. Coat. Technol. 2006;
Shi-Hong Zhang, Tong-Yul Cho, Jae-Hong Yoon, Fang W, Ki-O Song, Ming-Xi Li, Yun-
Kon Joo, Lee CG. Characterization of microstructure and surface properties of hybrid
coatings of WC–CoCr prepared by laser heat treatment and high velocity oxygen fuel
spraying. Mater. Charact. 2008; 59; 1412-1418.
Ruhi G, Modi OP, Sinha ASK, Singh IB. Effect of sintering temperatures on corrosion and
wear properties of sol–gel alumina coatings on surface pre-treated mild steel. Corros. Sci.
2008; 50; 639–649.
Wang BQ, Lee SW. Elevated temperature erosion of several thermal-sprayed coatings under
the simulated erosion conditions of in-bed tubes in a fluidized bed combustor. Wear 1997;
Souza RC, Voorwald HJC, Cioffi MOH. Fatigue strength of HVOF sprayed Cr3C2–25NiCr
and WC-10Ni on AISI 4340 steel. Surf. Coat. Technol. 2008; 203; 191–198.
Fernandez E, Garc?a JR, Cuetos JM, Higuera V. Behaviour of laser treated Cr, Ni coatings
in the oxidative atmosphere of a steam boiler. Surf. Coat. Technol. 2005;195;1– 7.
Bala N, Singh H, Prakash S. An overview of characterizations and high temperature
behaviour of thermal spray NiCr coatings. Int. J. Mater. Sci. 2007;2(3);201-218.
Matthews SJ, James BJ, Hyland MM. Microstructural influence on erosion behaviour of
thermal spray coatings. Mater. Charact. 2007; 58; 59–64.
Kamal S, Jayaganthan R, Prakash S, Kumar S. Hot corrosion behavior of detonation gun
sprayed Cr3C2–NiCr coatings on Ni and Fe-based superalloys in Na2SO4–60% V2O5
environment at 900 °C. J. Alloys Compd. 2008; 463; 358–372.
Stein KJ, Schorr BS, Marder AR. Erosion of thermal spray MCr–Cr C cermet coatings.
Wear 1999; 224; 153–159.
Seong BG, Hwang SY, Kimb KY. High-temperature corrosion of recuperators used in steel
Mills. Surf. Coat. Technol. 2000; 126; 256-265.
Sidhu TS, Prakash S, Agrawal RD. Characterizations of HVOF sprayed NiCrBSi coatings
on Ni- and Fe-based superalloys and evaluation of cyclic oxidation behaviour of some Nibased
superalloys in molten salt environment. Thin Solid Films 2006; 515; 95–105.
Lawrence J, Lib L. Augmentation of the mechanical and chemical resistance characteristics
of an Al2O3-based refractory by means of high power diode laser surface treatment. J.
Mater. Process. Technol. 2003; 142; 461–465.
Sahraoui T, Fenineche N-E, Montavon G, Coddet C. Structure and Wear Behavior of HVOF
Sprayed Cr3C2-NiCr and WC-Co Coatings. Mater. Des. 2003; 24(5); 309-313.
Lih W-C, Yang SH, Su CY, Huang SC, Hsu IC, Leu MS. Effects of Process Parameters on
Molten Particle Speed and Surface Temperature and the Properties of HVOF CrC/NiCr
Coatings. Surf. Coat. Technol. 2000; 133-134; 54-60.
Sidhu HS, Sidhu BS, Prakash S. The role of HVOF coatings in improving hot corrosion
resistance of ASTM-SA210 GrA1 steel in the presence of Na2SO4–V2O5 salt deposits. Surf.
Coat. Technol. 2006; 200; 5386–5394.
Sidhu BS, Prakash S. Studies on the behaviour of stellite-6 as plasma sprayed and laser
remelted coatings in molten salt environment at 900 °C under cyclic conditions. J. Mater.
Process. Technol. 2006; 172; 52–63.
Wang Y. Friction and wear performances of detonation-gun- and plasma-sprayed ceramic
and cermet hard coatings under dry friction. Wear 1993; 161; 69-8.
Wang BQ, Luer K. The erosion-oxidation behavior of HVOF Cr3C2-NiCr cermet coating.
Wear 1994; 174; 177-185.
Wang BQ. Erosion-corrosion of coatings by biomass-fired boiler fly ash. Wear 1995; 188;
Wang BQ. Effect of alkali chlorides on erosion-corrosion of cooled mild steel and Cr3C2-
NiCr coating. Wear 1996; 199; 268-274.
Wang J, Zhang L, Sun B, Zhou Y. Study of the Cr3C2-NiCr detonation spray coating. Surf.
Coat. Technol. 2000; 130; 69-73.
Mateos J, Cuetos JM, Vijande R, Ferna′ndez E. Tribological properties of plasma sprayed
and laser remelted 75/25 Cr3C2/NiCr coatings. Trib. Int. 2001;34;345–351.
Wolfe DE, Eden TJ, Potter JK, Jaroh AP. Investigation and Characterization of Cr3C2-Based
Wear-Resistant Coatings Applied by the Cold Spray Process. J. Therm. Spray Technol.
2006; 15(3); 400-512.
?órawski W, Kozerski S. Scuffing resistance of plasma and HVOF sprayed WC12Co and
Cr3C2-25(Ni20Cr) coatings. Surf. Coat. Technol. 2008; 202; 4453–4457.
Matthews S, James B, Hyland M. The role of microstructure in the mechanism of high
velocity erosion of Cr3C2–NiCr thermal spray coatings: Part 1—As-sprayed coatings, Surf.
Coat. Technol. 2009; 203; 1086–1093.
Verdon C, Karimi A, Martin J-LA. Study of High Velocity Oxy- Fuel Thermally Sprayed
Tungsten Carbide Based Coatings. Part 1: Microstructures. Mater. Sci. Eng. A 1998; 246;
Tao K, Zhou X, Cui H, Zhang J. Microhardness variation in heat-treated conventional and
nanostructured NiCrC coatings prepared by HVAF spraying. Surf. Coat. Technol. 2009;
Wang BQ, Shui ZR. Hot erosion behavior of carbide–metal composite coatings. J. Mater.
Process. Technol. 2003; 143–144; 87–92.
Kamal S, Jayaganthan R, Prakash S. High temperature oxidation studies of detonation-gunsprayed
Cr3C2–NiCr coating on Fe- and Ni-based superalloys in air under cyclic condition
at 900 °C. J. Alloys Compd. 2009; 472; 378–389.
Sidhu TS, Prakash S, Agrawal RD. Hot corrosion and performance of nickel-based coatings.
Current Sci. 2006; 90(1); 41-47.
Sundararajan G, Sudharshan PP, Jyothirmayi A, Gundakaram RC. The influence of heat
treatment on the micro structural, mechanical and corrosion behaviour of cold sprayed SS
316L coatings. J of Mater Sci. 2009; 44; 2320–2326.
Wang BQ. Effect of post heat treatment and sealing on erosion resistance of several thermal
sprayed coatings. Proceedings of ICSE, Southwest Jiaotong University Press, Chengdu,
China, 2002; 138–143.
Matthews S, Hyland M, James B. Microhardness variation in relation to carbide
development in heat treated Cr3C2–NiCr thermal spray coatings. Acta Mater. 2003; 51;
Matthews S, James B, Hyland M. High temperature erosion of Cr3C2-NiCr thermal spray
coatings—The role of phase microstructure. Surf. Coat. Technol. 2009; 203(9); 1144-1153.
Suarez M, Bellayer S, Traisnel M, Gonzalez W, Chicot D, Lesage J, Puchi-Cabrera ES,
Staia MH. Corrosion behavior of Cr3C2–NiCr vacuum plasma sprayed coatings. Surf. Coat.
Technol. 2008; 202(18); 4566–4571.