Hot Corrosion Performance of Plasma-Sprayed Multiwalled Carbon Nanotube–Al2O3 Composite Coatings in a Coal-Fired Boiler at 900 °C

Goyal, Rakesh; Sidhu, Buta Singh; Chawla, Vikas

doi:10.1007/s11665-020-05070-8

Cited by 24 publications

(2 citation statements)

References 45 publications

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“…In addition, the introduction of reinforcing phase particles is also a powerful measure to improve the mechanical and thermal corrosion properties of alloys. (Goyal et al, 2018(Goyal et al, , 2020Singla et al, 2016). For example, Fan et al (2014) prepared TiC particle-reinforced (FeCrNiCo)AlxCuy HEAs and found that there was good wettability between TiC and the HEAs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ti and C addition on oxidation resistance of FeCoCrNiMn high entropy alloys prepared by powder metallurgy

Wang,

Liu,

et al. 2024

ACMM

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Purpose The purpose of this paper is to study the high temperature oxidation behavior of Ti and C-added FeCoCrNiMn high entropy alloys (HEAs). Design/methodology/approach Cyclic oxidation method was used to obtain the oxidation kinetic profile and oxidation rate. The microstructures of the surface and cross section of the samples after oxidation were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). Findings The results show that the microstructure of the alloy mainly consisted of FCC (Face-centered Cubic Structure) main phase and carbides (M7C3, M23C6 and TiC). With the increase of Ti and C content, the microhardness, strength and oxidation resistance of the alloy were effectively improved. After oxidation at a constant temperature of 800 °C for 100 h, the preferential oxidation of chromium in the chromium carbide determined the early formation of dense chromium oxide layers compared to the HEAs substrate, resulting in the optimal oxidation resistance of the TC30 alloy. Originality/value More precipitated CrC can preferentially oxidize and rapidly form a dense Cr2O3 layer early in the oxidation, which will slow down the further oxidation of the alloy.

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Section: Introductionmentioning

confidence: 99%

Effect of Ti and C addition on oxidation resistance of FeCoCrNiMn high entropy alloys prepared by powder metallurgy

Wang,

Liu,

et al. 2024

ACMM

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“…They concluded that there was a 70% reduction in the corrosion rate of the Al 2 O 3 /MWCNT coating as compared to the Al 2 O 3 coating. 47 However, a limited amount of research has been published on the CNTs reinforced with Cr 3 C 2 -NiCr coatings. Gahlin reported that diamond-like carbon coatings on automotive components improved wear resistance and reduced friction, leading to increased resistance to seizures at sliding surfaces.…”

Section: Introductionmentioning

confidence: 99%

Hot-corrosion behaviour of CNT reinforced Cr₃C₂-NiCr coatings working under high-temperature sprayed by HVOF method

Kuruba¹,

Gaikwad²,

Shivalingappa³

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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The thermal power plant boiler tubes experience degradation of their surfaces due to oxidation and molten salt corrosion while working at elevated temperatures. The formation of protective coating layers can overcome such surface degradation. In the current research, protective coated layers composed of Cr3C2-25% NiCr/Carbon nanotube coatings are deposited on the ASTM SA-213T12 boiler tube substrate by the High-Velocity Oxy-Fuel (HVOF) thermal method. The coating powder Cr3C2-25%NiCr is reinforced with 3, 5 and 7 wt% of Multi-Wall Carbon Nano-Tube (MWCNT) prior to deposition. The uncoated and coated specimens are evaluated for hot corrosion behaviour in the molten salt environment (Na2SO4 + 60%V2O5) for 50 cycles, constituting 1 h of heating at 600 °C. Thermogravimetric analysis is used to investigate the kinetics of hot corrosion behaviour in both coated and uncoated samples. Coatings are characterized with the help of X-ray diffraction and Scanning Electron Microscope/Energy Dispersive Spectroscopy (SEM/EDS) techniques. Microstructural investigations with the help of SEM/EDS and X-ray diffraction of coated and uncoated samples revealed that 7 wt% of CNT coated samples minimized the voids and pores of the coatings, leading to better interlocking with the substrate surface. Furthermore, it is observed in the studies that the appreciable corrosion resistance of 7 wt% of CNT composite coatings is higher than 3 and 5 wt% of CNT-coated and uncoated samples.

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Improvements in Hot Corrosion Behavior of CO2 Laser-Welded Fe-Based A-286 Alloy in an Aggressive Salt Environment by High-Velocity Oxy-Fuel Coating

Arivarasu¹

2022

J. of Materi Eng and Perform

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Hot Corrosion Performance of Plasma-Sprayed Multiwalled Carbon Nanotube–Al2O3 Composite Coatings in a Coal-Fired Boiler at 900 °C

Cited by 24 publications

References 45 publications

Effect of Ti and C addition on oxidation resistance of FeCoCrNiMn high entropy alloys prepared by powder metallurgy

Effect of Ti and C addition on oxidation resistance of FeCoCrNiMn high entropy alloys prepared by powder metallurgy

Hot-corrosion behaviour of CNT reinforced Cr₃C₂-NiCr coatings working under high-temperature sprayed by HVOF method

Improvements in Hot Corrosion Behavior of CO2 Laser-Welded Fe-Based A-286 Alloy in an Aggressive Salt Environment by High-Velocity Oxy-Fuel Coating

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Hot Corrosion Performance of Plasma-Sprayed Multiwalled Carbon Nanotube–Al2O3 Composite Coatings in a Coal-Fired Boiler at 900 °C

Cited by 24 publications

References 45 publications

Effect of Ti and C addition on oxidation resistance of FeCoCrNiMn high entropy alloys prepared by powder metallurgy

Effect of Ti and C addition on oxidation resistance of FeCoCrNiMn high entropy alloys prepared by powder metallurgy

Hot-corrosion behaviour of CNT reinforced Cr3C2-NiCr coatings working under high-temperature sprayed by HVOF method

Improvements in Hot Corrosion Behavior of CO2 Laser-Welded Fe-Based A-286 Alloy in an Aggressive Salt Environment by High-Velocity Oxy-Fuel Coating

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Hot-corrosion behaviour of CNT reinforced Cr₃C₂-NiCr coatings working under high-temperature sprayed by HVOF method