High Temperature Corrosion Studies in Molten Salt Using Salt Purification and Alloy Coating

Sawant, S.S.; Gajbhiye, Bhavesh D.; Tyagi, Sachin; Sona, C.S.; Divya, R.; Mathpati, Channamallikarjun S.; Borgohain, A.; Maheshwari, N. K.

doi:10.1080/00194506.2016.1256236

Cited by 12 publications

(5 citation statements)

References 17 publications

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“…In addition, the presence of element W in Hastelloy C-276 leads to grain refinement [ 12 ], which provides good corrosion resistance and mechanical properties [ 13 ]. Hastelloy B has relatively high Mo contents and thus has good corrosion resistance against medium concentrations of sulfuric acid solutions (or contains a certain amount of chloride ions) [ 14 ]. Ni–Cu alloys, such as Monel alloys, have received increasing attention from researchers because of their excellent corrosion resistance [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the physical and electrochemical properties of typical Ni-based alloys used for the bipolar plates of proton exchange membrane fuel cells

Zhong

Hou

Zhang

et al. 2023

Heliyon

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Section: Introductionmentioning

confidence: 99%

Investigation on the physical and electrochemical properties of typical Ni-based alloys used for the bipolar plates of proton exchange membrane fuel cells

Zhong

Hou

Zhang

et al. 2023

Heliyon

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“…However, the challenge is extremely high corrosion with molten fluoride salts . From our previous work typical corrosion rates of high‐temperature alloys like Hastelloy‐B, Inconel‐625, and Hastelloy‐X in FLiNaK at 650°C are 3.02, 23.70, and 37.50 mm/year, respectively . Due to this, it is important to get the thermal hydraulics of the heat transfer medium at operating temperature with suitable material of construction.…”

Section: Introductionmentioning

confidence: 99%

“…As molten salts like FLiNaK and KCl‐MgCl 2 are highly corrosive in nature, high temperature (650°C‐850°C) corrosion studies have been carried out to investigate the materials compatible with various molten salts . FLiNaK being the most corrosive salt, the material of construction is selected accordingly after the corrosion studies.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, based on the analysis from the literature review for the design of Generation‐IV nuclear reactors the major challenges were identified and experiments were planned accordingly. The material corrosion analysis in molten FLiNaK salt was carried out at high temperatures (650°C‐850°C) and the results are reported in our previous work . Based on the corrosion information, a high temperature forced convection loop for experimental thermal hydraulic studies of the extremely corrosive molten fluoride salts was designed and fabricated.…”

Section: Introductionmentioning

confidence: 99%

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Pretest in forced circulation molten salt heat transfer loop: Studies with thermia‐B

Gajbhiye

Sona

Mathpati

et al. 2019

Heat Trans. Asian Res.

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Molten salts have potential application as an efficient heat transfer medium in a primary and secondary heat exchanger in high temperature next-generation nuclear power plant. Thermal hydraulic studies are vital for reliable and cost-effective design of the nuclear power plant. Therefore heat transfer study of molten salts will play a vital role in this area. In this work, an experimental system was designed to study thermal hydraulics of the molten salt system up to 700°C. This work describes the pretest results of the experimental facility for extremely corrosive molten fluoride salts with a simulant thermia-B as the working fluid. In the present work, the details of the system are discussed and thermal-hydraulic data for heat transfer fluid thermia-B has been presented. Experiments were carried out at Reynolds number in the range of 4500 to 40 500 and Prandtl number in the range of 34 to 144.Effect of Reynolds number, melting tank temperature, and heat input to test section on forced convective heat transfer was studied under turbulent conditions. Comparison of the experimental data with different empirical correlations has been presented.Abbreviations: CFD, computational fluid dynamic; ICP-AES, inductively coupled plasma-atomic emission spectroscopy; LES, large eddy simulations; MFR, mass flow rates; NGNP, next-generation nuclear plant; PLC, programmable logic controller; RTD, resistance temperature detectors; SCADA, supervisory control and data acquisition; VFD, variable frequency drive; WTMM, wavelet transform modulus maxima. K E Y W O R D S molten salt heat transfer loop, Nusselt number, Reynolds number, thermic fluid, turbulent flow, wall heat flux 1 | INTRODUCTION Per capita, energy consumption relates directly to the overall development of any nation. As per the recent data (2016) per capita, the energy consumption of the United States is 1377 W, Russia is 854 W, France is 736 W, Australia is 1112 W, China is 510 W, and India is 128 W. Therefore, energy is an essential input for the sustained growth in development. The answer to this high and cost-effective energy requirement in future is nuclear power energy. Nuclear power is the cleanest form of mass-energy generation, producing no greenhouse gases like CO 2 , SO 2 , and ash. Nuclear reactors can produce tremendous heat which can be utilized for the production of electricity with high conversion efficiency. Also, due to depletion in fossil fuels, there will be a great demand for alternative cleaner energy resource such as hydrogen. Hydrogen production processes such as thermochemical water splitting and electrolysis require temperatures above 750°C. This high-temperature heat can be obtained from nuclear reactors. But present operational nuclear reactors have maximum outlet temperatures between 300°C and 650°C. 1 Hence, the hydrogen production plant is considered as a major unit coupled with nextgeneration nuclear reactors which are proposed for cogeneration of electricity and hydrogen. The possible heat transfer medium for next-generation nuclear rea...

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“…negative Gibbs free energy of formation of fluorine based corrosion products. In addition, accelerated corrosion can occur due to the presence of commonly found impurities in fluoride molten salts (SO 4 2-, Cl -, H 2 O) [6][7][8]. It is thus important to closely control the purity of the salt during the operation of any molten-salt based system.…”

Section: Introductionmentioning

confidence: 99%

The effect of cold-rolling on the microstructure and corrosion behaviour of 316L alloy in FLiNaK molten salt

et al. 2018

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High Temperature Corrosion Studies in Molten Salt Using Salt Purification and Alloy Coating

Cited by 12 publications

References 17 publications

Investigation on the physical and electrochemical properties of typical Ni-based alloys used for the bipolar plates of proton exchange membrane fuel cells

Investigation on the physical and electrochemical properties of typical Ni-based alloys used for the bipolar plates of proton exchange membrane fuel cells

Pretest in forced circulation molten salt heat transfer loop: Studies with thermia‐B

The effect of cold-rolling on the microstructure and corrosion behaviour of 316L alloy in FLiNaK molten salt

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