Nickel based coatings used for erosion-corrosion protection in a geothermal environment

Csáki, Ioana; Ragnasdottir, Kolbrun Ragna; Buzaianu, Aurelian; Leósson, Kristján; Motoiu, Vlad; Guðlaugsson, Sæmundur; Lungu, M.; Haraldsdóttir, Helen Ósk; Karlsdóttir, Sigrún N.

doi:10.1016/j.surfcoat.2018.07.029

Cited by 10 publications

(6 citation statements)

References 11 publications

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“…In another study by Csaki et al., [ 166 ] a NiCrBSi (Ni ≈82 wt.%) HVOF thermally sprayed coating was tested for erosion‐corrosion protection of carbon steel through in‐situ exposure at the Hellisheiði geothermal power plant (Reykjavik, Iceland). In the work, coated coupons and un‐coated carbon steel specimens were exposed for 30 days to steam at 210° temperature, 18 bar pressure, and 31 m s −1 velocity in an ad‐hoc testing apparatus built to simulate conditions of the fluid entering the steam turbine in the power plant.…”

Section: Review Of Paint and Coating Systemsmentioning

confidence: 99%

Research and Development on Coatings and Paints for Geothermal Environments: A Review

Fanicchia,

Karlsdottir

2023

Adv Materials Technologies

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Geothermal power plants are complex systems, where the interplay between different metallic components transforms the enthalpy of hot brine in the form of electricity or usable heated water. The naturally occurring variety in brine chemistry, linked to the presence of specific key species, and its thermo‐physical properties, leads to the development of different power plant configurations. Key species and power plant configuration in turn determine the extent of damage experienced by each component in the power plant: erosion, corrosion, and/or scaling, often acting combined. Paints and coatings, compared to changing the component alloy, have represented a preferred solution to mitigate these issues due to advantages in terms of costs and repairability. This is reflected in the large number of publications on research and development in this area within the past ≈50 years, with even an increasing trend in the past 10–20 years, indicating the strong interest to develop this clean and sustainable energy source. Therefore, in this work, the first of its kind after 1980, an in‐depth review of all published work on research performed on paints and coatings for geothermal applications, subdivided by the material system, is provided.

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Section: Review Of Paint and Coating Systemsmentioning

confidence: 99%

Research and Development on Coatings and Paints for Geothermal Environments: A Review

Fanicchia,

Karlsdottir

2023

Adv Materials Technologies

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“…[42][43][44] Ni-based alloys are popular for their strong toughness, high oxidation resistance, and high corrosion resistance, even at very high temperatures. 45 The cobalt matrix embedded by tungsten carbide (WC) ceramic of WC-8CO is popular choice for antiwear applications due to its high hardness and toughness. It also possesses anti-corrosion properties for almost every kind of medium.…”

Section: Ss-304mentioning

confidence: 99%

Effect of variation of WC reinforcement on metallurgical and cavitation erosion behavior of microwave processed NiCrSiC-WC composites clads

Bansal

Kaushal²,

Mago

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Components operating in fluid handling systems most frequently experience cavitation erosion. The coatings/claddings fabricated by microwave irradiation method can remarkably improve cavitation erosion. In the present work, WC reinforced NiCrSiC based metal matrix composite clads with varying weight percentage of WC particles were developed on SS 316 steel using microwave heating method. The metallurgical and microstructural study of composite clads were analyzed using SEM/EDS, XRD and porosity, microhardness was also investigated. Cavitation erosion behavior of the claddings were evaluated using vibratory cavitation erosion tester. The failure mechanism due to cavitation erosion was explored using SEM study. The relationship of cavitation erosion behavior with variation in weight percentage (10%, 20%, and 30%) of reinforced particles in the composite clad was also explored. It has been observed that with an increase in the weight percentage of WC particles, the cavitation erosion rates decreased drastically initially (37.9%) and, but later significant change was not observed (4.89%, 2.44%). Eroded surface study revealed that with increase in the weight percentage of WC reinforcement the mode of damage changes from ductile to brittle. Further it was studied that the pits, crater, micro-cracks, and plastic deformation were the primary wear mechanisms.

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“…Csaki et al studied NiCrBSi coatings sprayed by the HVOF process, obtaining the least porous, improving wear and corrosion resistance. 36,37 In their research work, Sidhu et al reported that maximum weight accumulated due to the non-resisting scale of Fe 2 O 3 which was formed during hot-corrosion exposed to a Na 2 SO 4 -60%V 2 O 5 environment. 38 When working in a boiler environment with an unprotective Fe 2 O 3, the layer deposited on the surface, Saroop et al found that WC-12%Co coatings caused less corrosion in SS 316 samples than SS 306 samples.…”

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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Nickel based coatings used for erosion-corrosion protection in a geothermal environment

Cited by 10 publications

References 11 publications

Research and Development on Coatings and Paints for Geothermal Environments: A Review

Research and Development on Coatings and Paints for Geothermal Environments: A Review

Effect of variation of WC reinforcement on metallurgical and cavitation erosion behavior of microwave processed NiCrSiC-WC composites clads

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

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Nickel based coatings used for erosion-corrosion protection in a geothermal environment

Cited by 10 publications

References 11 publications

Research and Development on Coatings and Paints for Geothermal Environments: A Review

Research and Development on Coatings and Paints for Geothermal Environments: A Review

Effect of variation of WC reinforcement on metallurgical and cavitation erosion behavior of microwave processed NiCrSiC-WC composites clads

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

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