Comparative Study of Corrosion Performance of HVOF-Sprayed Coatings Produced Using Conventional and Suspension WC-Co Feedstock

Ahmed, Rehan; Vourlias, G.; Algoburi, Ahmed; Vogiatzis, C. A.; Chaliampalias, D.; Σκολιανός, Σ.; Berger, Lutz‐Michael; Paul, Shiladitya; Faisal, Nadimul Haque; Toma, Filofteia-Laura; Alanazi, Nayef M.; Goosen, Mattheus F. A.

doi:10.1007/s11666-018-0775-2

Cited by 21 publications

(8 citation statements)

References 39 publications

(38 reference statements)

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“…The carbide coating micrographs are presented in Figure 4c,d for WC-12Co and WC-10Co4, respectively. Both coatings had porosity under 1% and hardness above 1200 HV 0.3 , as shown in Table 3, which is consonant with values published by other authors [45,46]. The morphology is composed of particles of WC, which is the lighter phase uniformly distributed in Figure 4c,d, and the metal matrix or binder, the darker phase in Figure 4c,d.…”

Section: Characterization Of Coatingssupporting

confidence: 89%

Improving the Wear and Corrosion Resistance of Maraging Part Obtained by Cold Gas Spray Additive Manufacturing

Váz

Silvello

Albaladejo-Fuentes

et al. 2021

Metals

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The use of the cold gas spray (CGS) process as a metal additive manufacturing (MAM) technique for metallic part production has been deeply studied recently, mainly due to its advantages over other MAM techniques. CGS MAM is a high-productivity technique with a very low level of particle oxidation, microstructural changes, phase transformations, or deleterious residual thermal stresses in the part. The use of CGS MAM to produce maraging parts represents a gain for the industry by saving machining time and preventing raw material waste. Its wear resistance and corrosion behavior were evaluated in this work and were compared with cermet coatings deposited by high-velocity oxy-fuel (HVOF) on the CGS MAM maraging. This work presents the innovative and effective combination of different thermal spraying processes and materials to obtain MAM maraging parts with higher wear resistance, evaluating abrasion, sliding, and water erosion wear types.

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Section: Characterization Of Coatingssupporting

confidence: 89%

Improving the Wear and Corrosion Resistance of Maraging Part Obtained by Cold Gas Spray Additive Manufacturing

Váz

Silvello

Albaladejo-Fuentes

et al. 2021

Metals

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“…Myalska et al [4] showed that the introduction of TiC nanoparticles into a conventional WC-17Co powder slows down the WC carbide decomposition process and improves tribological properties. Attempts are also being made to produce carbide coatings in the process of high velocity spraying from suspensions [5]. A lower resistance of WC-Co coatings sprayed from suspensions was found in comparison to coatings sprayed conventionally with the HVOF method.…”

Section: Introductionmentioning

confidence: 99%

INFLUENCE OF PLASMA SPRAYING CONDITIONS ON THE MICROSTRUCTURE AND FUNCTIONAL PROPERTIES OF WC-Cr-Ni METALOCERAMIC LAYERS

Kubaszek¹,

Góral²,

Różański³

et al. 2019

JMM

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The article presents the results of research on the impact of the conditions of plasma spraying on thickness and porosity, as well as the erosion resistance of WC-Cr-Ni metaloceramic coatings. It was shown that the selection of current intensity -450 A and flow rate H 2 = 5 dm 3 /min and Ar = 68 dm 3 /min allows obtaining a coating with a thickness of approx. 177 μm and low porosity <6%. At the same time, this coating is characterised by the greatest hardness -758 HV0.5, and the best erosion resistance at room and elevated temperature. The analysis of test results indicates that lower current and hydrogen content in the plasma stream do not ensure sufficient melting of the metallic matrix of the powder -Ni and Cr, and thus greater brittleness of the coating and its lower erosion resistance. It was also found that an increase in plasma stream energy due to an increase in torch current or hydrogen flow rate may cause tungsten carbide to decompose in the plasma stream -the phase affecting hardness and abrasion resistance.

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“…Under this condition, the impedance can be determined via Equation (2) [ 35 ]:

where

is the angular frequency, and

and Q are parameters that are independent of the frequency. When

, Q corresponds to an ideal capacitor; otherwise, Q characterizes the non-uniform charge distribution along the electrode/solution interface due to surface heterogeneities [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

Comparative Study of Corrosion Behaviors of WC-NiMo and WC-Co Cemented Carbides

et al. 2023

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In this paper, the influence of a nickel binder metal and molybdenum carbide as an additional alloying element on the microstructure and corrosion behavior of WC-based cemented carbides, processed by conventional powder metallurgy, was studied, and a comparison with conventional cemented carbide (WC-Co) was carried out. The sintered alloys were characterized, before and after corrosive tests, by analyses using optical microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. The corrosion resistance of the cemented carbides was investigated by open circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy in a 3.5 wt.% NaCl solution. The WC-NiMo cemented carbides showed microstructures similar to those of WC-Co; however, pores and binder islands were observed in the microstructures. The corrosion tests showed promising results, the WC-NiMo cemented carbide showed superior corrosion resistance and higher passivation capacity than the WC-Co cemented carbide. The WC-NiMo alloy showed a higher EOC ≈−0.18 V vs. Ag|AgCl|KCl3mol/L than the WC-Co (EOC≈−0.45 V vs. Ag|AgCl|KCl3mol/L). The potentiodynamic polarization curves showed lower current density values throughout the potential range for the WC-NiMo alloy, and it was observed that Ecorr was less negative (≈−0.416 V vs. Ag|AgCl|KCl3mol/L) than for WC-Co (≈−0.543 V vs. V vs. Ag|AgCl|KCl3mol/L). The EIS analysis confirmed low rate corrosion of WC-NiMo associated with the formation of a passive thin layer. This alloy showed a higher Rct (1970.70 Ω).

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Comparative Study of Corrosion Performance of HVOF-Sprayed Coatings Produced Using Conventional and Suspension WC-Co Feedstock

Cited by 21 publications

References 39 publications

Improving the Wear and Corrosion Resistance of Maraging Part Obtained by Cold Gas Spray Additive Manufacturing

Improving the Wear and Corrosion Resistance of Maraging Part Obtained by Cold Gas Spray Additive Manufacturing

INFLUENCE OF PLASMA SPRAYING CONDITIONS ON THE MICROSTRUCTURE AND FUNCTIONAL PROPERTIES OF WC-Cr-Ni METALOCERAMIC LAYERS

Comparative Study of Corrosion Behaviors of WC-NiMo and WC-Co Cemented Carbides

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