Optimizing NiCr and FeCr HVOF Coating Structures for High Temperature Corrosion Protection Applications

Oksa, Maria; Metsäjoki, Jarkko

doi:10.1007/s11666-014-0192-0

Cited by 32 publications

(20 citation statements)

References 26 publications

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“…The literature suggests that thermal spray can retain the amorphous fraction in the feedstock [7,[13][14][15]. It is suggested that this effect is due to the rapid cooling rates that occur when the molten particles from the spray process are incident on the substrate, on the order of 10 6 k s -1 [8].…”

Section: Resultsmentioning

confidence: 99%

HVOF and Laser-Cladded Fe–Cr–B Coating in Simulated Biomass Combustion: Microstructure and Fireside Corrosion

Reddy

Shipway

Davis³

et al. 2017

Oxid Met

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Biomass is often considered as a low carbon alternative to fossil fuels in the power industry. However, the heat exchangers in biomass plants can suffer from chloride-based aggressive fireside corrosion. A commercially available amorphous Fe-Cr-B alloy was deposited onto a stainless steel substrate by HVOF thermal spray and laser cladding. The controlled environment corrosion tests were conducted in a HCl-rich environment at 700°C for 250 h with and without KCl deposits. The samples were examined with XRD, SEM and EDX mapping to understand the corrosion mechanisms. In the absence of any deposits, the amorphous HVOF coating performed very well with a thin oxide growth, whereas the crystalline laser cladding suffered from *350 lm metal loss. The scales were composed of MnWO 4 , Fe 2 O 3 , Fe 3 O 4 and Cr 2 O 3 . When a KCl deposit was present, the HVOF-sprayed coating delaminated from the substrate and MnCl 2 was found in the scale.

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Section: Resultsmentioning

confidence: 99%

HVOF and Laser-Cladded Fe–Cr–B Coating in Simulated Biomass Combustion: Microstructure and Fireside Corrosion

Reddy

Shipway

Davis³

et al. 2017

Oxid Met

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“…The above factors affect the properties of the plasma jet, the heating and accelerating process of flying particles in a jet, and then influence the microstructure and stability of the coatings. In addition, this is the main reason why in the practical fabrication and utilization processing of coatings, the properties of coatings fabricated under the same process parameters have significant differences [19][20][21]. Furthermore, this kind of experimental method has many disadvantages including large amounts of work, long experimental periods, and low efficiency.…”

mentioning

confidence: 99%

Effect of Particle In-Flight Behavior on the Microstructure and Fracture Toughness of YSZ TBCs Prepared by Plasma Spraying

Xiao

Ren

et al. 2018

Coatings

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The present study aims to elaborate particle in-flight behavior during plasma spraying and its significance in determining the microstructure and mechanical properties of plasma sprayed yttria partially stabilized zirconia (YSZ) thermal barrier coatings (TBCs). The as-sprayed YSZ coatings were characterized in terms of defects (such as pores, unmelted particles and cracks) and fracture toughness. The results showed that, due to the higher temperature and velocity of in-flight particles in a supersonic atmospheric plasma spraying (SAPS) compared to that of atmospheric plasma spraying (APS), denser coatings were formed leading to a better fracture toughness. The percentage of defects of the microstructure was similar to the temperature and velocity of particles in-flight during plasma spraying. Furthermore, the structural defects had a strong effect on its mechanical behavior. The total defect percentage and fracture toughness in SAPS-TBCs spanned 6.9 ± 0.17%–13.26 ± 0.22% and 2.52 ± 0.06 MPa m1/2–1.78 ± 0.19 MPa m1/2; and 11.11 ± 0.36%–17.15 ± 0.67% and 2.13 ± 0.08 MPa m1/2–1.4 ± 0.12 MPa m1/2 in APS-TBCs.

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“…In order to resist corrosion, thermal spraying coating requires high quality, i.e., low porosity and high bonding strength, and high corrosion resistance of coating materials. Oksa is committed to finding suitable coating materials and corresponding optimized spraying parameters [44,45].…”

Section: Thermal Spraymentioning

confidence: 99%

Recent Development of Corrosion Factors and Coating Applications in Biomass Firing Plants

Yuan

Liu

et al. 2020

Coatings

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Due to global warming, biomass fuels are gradually being used to replace fossil fuels. However, high-temperature biomass corrosion is a crucial issue affecting its future application. In this article, different factors affecting boiler performance are summarized from various studies to guide the optimization of boiler parameters in practical applications, such as corrosive components and boiler temperatures. Meanwhile, different coating formation methods and materials are summarized to provide better protection strategies. The potential coating materials for future research are also discussed. The addition of other elements, such as Ti, Mo, and W, has the potential to accelerate the formation of oxide layers during high-temperature corrosion and directly slow down the corrosion rate. Future studies should focus on these elements containing materials.

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Optimizing NiCr and FeCr HVOF Coating Structures for High Temperature Corrosion Protection Applications

Cited by 32 publications

References 26 publications

HVOF and Laser-Cladded Fe–Cr–B Coating in Simulated Biomass Combustion: Microstructure and Fireside Corrosion

HVOF and Laser-Cladded Fe–Cr–B Coating in Simulated Biomass Combustion: Microstructure and Fireside Corrosion

Effect of Particle In-Flight Behavior on the Microstructure and Fracture Toughness of YSZ TBCs Prepared by Plasma Spraying

Recent Development of Corrosion Factors and Coating Applications in Biomass Firing Plants

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