Hot corrosion behaviour of CNT-reinforced zirconium yttrium composite coating at elevated temperature

Kumar, Sandeep; Bhatia, Rakesh; Singh, Harmanpreet

doi:10.1016/j.matpr.2020.04.836

Cited by 7 publications

(4 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The XRD analysis confirmed the presence of the Zr, Cr and O elements over the surface. The addition of ZrO 2 in the coating of the substrate material increases the resistance to the corrosion, such behaviour of ZrO 2 particles was also observed by Kumar et al (2020) and Ebrahim-Ghajari et al (2015). The 20 Wt.% ZrO 2 –Cr 2 O 3 coating on T-22 steel provided even better resistance than uncoated, Cr 2 O 3 -coated T-22 boiler steel and 10 Wt.% ZrO 2 –Cr 2 O 3 -coated T-22 boiler steel.…”

Section: Discussionmentioning

confidence: 66%

“…The results showed that the deposition of tungsten carbide had led to increase in the oxidation resistance. Kumar et al (2020) carried out the systematic experimental study to evaluate the hot corrosion behaviour of zirconium yttrium composite coating reinforced with carbon Nano tubes and concluded that the CNT-reinforced composite coating provided the better corrosion resistance, while porosity of the composite coating was decreased with the addition of the CNT in the zirconium yttrium coating. It has been also observed from the literature that no research has been done using the zirconium and chromium composite coating on ASTM-SA213-T-22 boiler steel.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High temperature corrosion behaviour of ZrO₂ reinforced Cr₂O₃ composite coatings in molten salt environment

Goyal

Singh

et al. 2023

ACMM

View full text Add to dashboard Cite

Purpose This paper aims to investigate the high temperature corrosion behaviour of ZrO2-reinforced Cr2O3 matrix-based composite coatings on ASTM-SA213-T-22 steel at 900°C in molten salt environment. The different coatings were deposited by high velocity oxy fuel (HVOF) method. Design/methodology/approach Hot corrosion studies were conducted in simulated boiler environment in silicon carbide tube furnace at 900°C for 50 cycles on bare and HVOF-coated boiler steel specimens. Each cycle consisted 50 h of heating in the simulated boiler environment followed by 20 min of cooling in air. The weight change measurements were performed after each cycle to establish the kinetics of corrosion using thermogravimetric technique. X-ray diffraction and scanning electron microscopy techniques were used to analyse the corroded specimens. Findings The addition of 20 Wt.% ZrO2 in Cr2O3 helped reduce corrosion rate by 89.25% as compared to that of uncoated specimen. The phase analysis revealed the presence of Cr2O3 and ZrO2 phases in composite coating matrix, which may have prevented the base metal from interacting with the corrosive elements present in the highly aggressive environment and thus had increased the resistance to hot corrosion. Originality/value It should be mentioned here that high temperature corrosion behaviour of thermally sprayed ZrO2–Cr2O3 composite coatings has never been studied, and to the best of the authors’ knowledge, it is not available in the literature. Hence, present investigation can provide valuable information for application of ZrO2-reinforced coatings in high temperature fuel combustion environments.

show abstract

Section: Discussionmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

High temperature corrosion behaviour of ZrO₂ reinforced Cr₂O₃ composite coatings in molten salt environment

Goyal

Singh

et al. 2023

ACMM

View full text Add to dashboard Cite

show abstract

“…Thus, CNT plays a vital role in the reduction of hot corrosion. The voids, cracks and micro holes in the coating microstructure were filled with the CNT, which acts as a barrier to the corrosive elements (Kumar et al , 2020a, 2020b; Alia et al , 2017b; Gell et al , 2018). Therefore, based on the present research work, it can be concluded that CNT reinforcement in ZrO 2 Y 2 O 3 coatings was able to provide better corrosion resistance than the conventional coatings for boiler alloy steel at an elevated working temperature.…”

Section: Discussionmentioning

confidence: 99%

Hot corrosion behaviour of CNT-reinforced ZrO₂-Y₂O₃ composite coatings on boiler tube steel at 900°C

Kumar

Bhatia²,

Singh³

2021

ACMM

Self Cite

View full text Add to dashboard Cite

Purpose In Indian thermal power plants, the main cause of boiler tube failure is the presence of molten sulphates and vanadates, which deteriorate the tube material at high temperatures. To combat the hot corrosion failure of metals, thermal spray technology is adopted. This study aims to investigate and study the effect of hot corrosion behaviour of carbon nanotube (CNT)-reinforced ZrO2-Y2O3 composite coatings on T-91 boiler tube steel in a molten salt environment at 900 °C for 50 cycles. Design/methodology/approach A plasma spray technique was used for development of the coatings. The samples were exposed to hot corrosion in a silicon tube furnace at 900 °C for 50 cycles. After testing, the test coupons were analysed by X-ray diffraction, scanning electron microscopy/energy dispersive spectroscopy and cross-sectional analysis techniques to aid understanding the kinetics of the corrosion reaction. Findings CNT-based reinforced coatings showed lower weight gain along with the formation of protective oxide scales during the experimentation. Improvement in protection against hot corrosion was observed with increase in CNT content in the coating matrix. Originality/value It is pertinent to mention here that the high temperature behaviour of CNT-reinforced ZrO2-Y2O3 composite on T-91 steel at 900°C temperature in molten salt environment has never been studied. Thus, the present research was conducted to provide useful results for the application of CNT-reinforced composite coatings at elevated temperature.

show abstract

“…Furthermore, due to the polarization phenomenon of CNTs, the appropriate CNT content can effectively enhance the corrosion resistance of the material [26][27][28][29]. In addition, CNTs can also be used with other elements to strengthen the properties through synergistic interactions or by refining the grain [30][31][32][33][34]. CNTs can also strengthen the thermal stability of materials by filling the pores [35].…”

Section: Introductionmentioning

confidence: 99%

Effect of carbon nanotube content and annealing temperature on corrosion performance of carbon nanotube/Ni composite layer

Li,

Yang,

Xiao

et al. 2024

Mater. Res. Express

View full text Add to dashboard Cite

Adding carbon nanotubes (CNTs) to metal composites changes their corrosion resistance, which is significantly affected by the distribution of CNTs. In this study, the effect of the content and distribution of CNTs on the corrosion resistance of composites was investigated by changing the electrodeposition process. The results indicated that could inhibit grain growth and act as an elemental channel for passivation film formation, which positively enhanced the corrosion resistance of the material. However, the annealing used to improve the bonding strength of CNTs to the matrix increased the grain size of the material, which had a weakening effect on the corrosion resistance. Using ultrasonic in electrodeposition had an obvious promoting effect on the uniform distribution of CNTs. The composites with 0.1 g/L CNT showed the best corrosion resistance after annealing for 30 min at 600 °C.

show abstract

Hot corrosion behaviour of CNT-reinforced zirconium yttrium composite coating at elevated temperature

Cited by 7 publications

References 34 publications

High temperature corrosion behaviour of ZrO₂ reinforced Cr₂O₃ composite coatings in molten salt environment

High temperature corrosion behaviour of ZrO₂ reinforced Cr₂O₃ composite coatings in molten salt environment

Hot corrosion behaviour of CNT-reinforced ZrO₂-Y₂O₃ composite coatings on boiler tube steel at 900°C

Effect of carbon nanotube content and annealing temperature on corrosion performance of carbon nanotube/Ni composite layer

Contact Info

Product

Resources

About

Hot corrosion behaviour of CNT-reinforced zirconium yttrium composite coating at elevated temperature

Cited by 7 publications

References 34 publications

High temperature corrosion behaviour of ZrO2 reinforced Cr2O3 composite coatings in molten salt environment

High temperature corrosion behaviour of ZrO2 reinforced Cr2O3 composite coatings in molten salt environment

Hot corrosion behaviour of CNT-reinforced ZrO2-Y2O3 composite coatings on boiler tube steel at 900°C

Effect of carbon nanotube content and annealing temperature on corrosion performance of carbon nanotube/Ni composite layer

Contact Info

Product

Resources

About

High temperature corrosion behaviour of ZrO₂ reinforced Cr₂O₃ composite coatings in molten salt environment

High temperature corrosion behaviour of ZrO₂ reinforced Cr₂O₃ composite coatings in molten salt environment

Hot corrosion behaviour of CNT-reinforced ZrO₂-Y₂O₃ composite coatings on boiler tube steel at 900°C