Hot Corrosion Behaviour of Different Ceramics Coatings on Boiler Tube Steel at 800 °C Temperature

Singh, Amritbeer; Goyal, Khushdeep; Goyal, Rakesh; Krishan, Bal

doi:10.1007/s40735-020-00461-9

Cited by 11 publications

(7 citation statements)

References 38 publications

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“…The failure of thermal spray coatings has been linked to the severe development of oxide layers [7]. Many researchers have discovered that changing the microstructure of these coatings can increase their corrosion resistance [8,9]. The microstructure of coatings is affected by various coating spraying procedures, as well as post-treatment of as-sprayed coatings [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of nano yttria-stabilized zirconia on properties of Ni-20Cr composite coatings

Singh

Goyal

Bhatia

2022

J. Electrochem. Sci. Eng.

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In the present work, 5 wt.% and 10 wt.% yttria-stabilized zirconia (YSZ) nanoparticles were reinforced in Ni-20Cr powder and deposited on boiler tube steel using a high-velocity oxy-fuel spraying process. The effect of YSZ reinforcement on microhardness, surface roughness and porosity was investigated. The hardness was the highest for nanocomposite coating reinforced with 10 wt.% YSZ and hardness was found to increase with a decrease in porosity. The coating microstructure and elements were characterized using field emission scanning electron microscopy (FE-SEM) with an energy dispersive spectroscope (EDS). The constituents of the coating were identified using X-ray diffractometer. It was found that the composite coating with 10 wt.% YSZ reinforced nanocomposite coating has the highest microhardness, in the range of 1008-1055 hv. During the coating process, nano YSZ particles were dispersed in the gaps between the micrometric Ni-20Cr particles, providing a better coating matrix than conventional Ni-20Cr. The Ni-20Cr with 10 wt.% of YSZ nanoparticles showed better results in terms of mechanical and microstructural properties during the investigation.

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Section: Introductionmentioning

confidence: 99%

Effect of nano yttria-stabilized zirconia on properties of Ni-20Cr composite coatings

Singh

Goyal

Bhatia

2022

J. Electrochem. Sci. Eng.

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“…Hot corrosion is an unwanted phenomenon in boilers of thermal power plants due to its high operating temperatures [1,2]. With the depletion of fossil fuels, the use of low-grade fuels is increasing in thermal power plants across the globe.…”

Section: Introductionmentioning

confidence: 99%

Development of CNT reinforced Al2O3-TiO2 coatings for boiler tubes to improve hot corrosion resistance

Goyal

2022

J. Electrochem. Sci. Eng.

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This study examines the hot corrosion behaviour of plasma-coated T12 steel for 10 cycles of 100 h each in an industrial boiler. The coating contains CNT (carbon nanotubes) reinforced alumina-titania powders. The substrates were exposed to the boiler at 750 °C. A thermogravimetric examination was conducted to evaluate the kinetics of corrosion. Corroded samples were examined with scanning electron microscopy and x-ray diffraction analysis after the end of the corrosion cycle. This research study concludes that CNT-reinforced coatings provide better corrosion resistance than conventional alumina coatings in the boiler environment.

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“…Coating of cermets on the superalloys can certainly be beneficial in enhancing the life of operation of the components made of superalloys [9][10][11]. HVOF technique is the most popularly used thermal spray coating technique of deposition of cermets onto the substrates, as it is proved to provide a coating with properties like good bond strength between substrate and coating, less porosity, and laminar structured coating [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Effect of Coating Al₂O₃+70% NiCrBSi Cermets on Ti‐31 Superalloy to Combat Hot Corrosion

Kumar¹,

Suresh²,

Jegadeeswaran

et al. 2022

Journal of Nanomaterials

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The superalloys are generally used for high-temperature applications, and since they operate in an aggressive environment, it is required to protect them with an appropriate coating to enhance the life of the superalloy material. In the present study, the superalloy Ti-31 is coated with cermets Al2O3+NiCrBSi by high-velocity oxy fuel (HVOF) spray coating technique, and hot corrosion tests were performed on both coated and uncoated samples, in presence of Na2SO4+60% V2O5 molten salt at a temperature of 700°C, and the corroded samples are characterized using SEM/EDS and XRD techniques. From the thermogravimetric studies, it is observed that total weight gain per unit area for uncoated Ti-31 is very high compared to Al2O3+NiCrBSi-coated Ti-31 and parabolic rate constant indicates that corrosion rate is decreased when substrate is coated. The current study’s findings clearly show that the coating deposition is effective in protecting the substrate from hot corrosion.

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Hot Corrosion Behaviour of Different Ceramics Coatings on Boiler Tube Steel at 800 °C Temperature

Cited by 11 publications

References 38 publications

Effect of nano yttria-stabilized zirconia on properties of Ni-20Cr composite coatings

Effect of nano yttria-stabilized zirconia on properties of Ni-20Cr composite coatings

Development of CNT reinforced Al2O3-TiO2 coatings for boiler tubes to improve hot corrosion resistance

Experimental Investigation on the Effect of Coating Al₂O₃+70% NiCrBSi Cermets on Ti‐31 Superalloy to Combat Hot Corrosion

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Hot Corrosion Behaviour of Different Ceramics Coatings on Boiler Tube Steel at 800 °C Temperature

Cited by 11 publications

References 38 publications

Effect of nano yttria-stabilized zirconia on properties of Ni-20Cr composite coatings

Effect of nano yttria-stabilized zirconia on properties of Ni-20Cr composite coatings

Development of CNT reinforced Al2O3-TiO2 coatings for boiler tubes to improve hot corrosion resistance

Experimental Investigation on the Effect of Coating Al2O3+70% NiCrBSi Cermets on Ti‐31 Superalloy to Combat Hot Corrosion

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Experimental Investigation on the Effect of Coating Al₂O₃+70% NiCrBSi Cermets on Ti‐31 Superalloy to Combat Hot Corrosion