Effect of moisture on corrosion of Ni-based alloys in molten alkali fluoride FLiNaK salt environments

Ouyang, Fan-Yi; Chang, Chin‐Yu; You, Bo-Chien; Yeh, Tsung‐Kuang; Jia, Kai

doi:10.1016/j.jnucmat.2013.02.021

Cited by 129 publications

(43 citation statements)

References 11 publications

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“…The average corrosion rates of all alloys decreased with the augment of the immersion time, in which case the similar rule was shown on carbon steel at 350 °C, because the water vapor and the oxygen dissolved in the molten salt, which could induce the corrosion of the alloys as described above, were almost depleted after a certain period of immersion. Also in this period, a protective layer of Cr 2 O 3 is reported to form on the surface of the alloys that contains chromium, which leads to the slowdown of the corrosion rate for the immersed alloys.…”

Section: Resultssupporting

confidence: 72%

Investigation on static and dynamic corrosion behaviors of thermal energy transfer and storage system materials by molten salts in concentrating solar power plants

Wang

Jiang

et al. 2018

Materials & Corrosion

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With the emergence of the concentrating solar power (CSP) technology, the corrosion behaviors of potential materials applied in thermal energy transfer and storage system attract tremendous attentions. Corrosion behaviors of X80 carbon steel, 304, 316L stainless steels, and 600, 825 nickel alloys in the molten salt mixtures at different temperatures were comparatively investigated using immersion tests under static and dynamic states and electrochemical scans. The corrosion resistance of stainless steels and nickel‐based alloys in molten salt at 530 °C followed the sequence of 304<316L<600<825. The aggressiveness of different molten salt mixtures was compared, indicating that the ternary system was more aggressive than the binary system. The corrosion aggressiveness under dynamic state was more severe when compared to that under the static state. The N2 atmosphere was proved to be protective for alloys immersed in high temperature molten salts.

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Section: Resultssupporting

confidence: 72%

Investigation on static and dynamic corrosion behaviors of thermal energy transfer and storage system materials by molten salts in concentrating solar power plants

Wang

Jiang

et al. 2018

Materials & Corrosion

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“…These pits presented diameters ranging from few to hundred micrometers and a corrosion depth of 1.5 mm in the entire cross section. The local impurity condensation in static FLiNaK and/or on the substrate causes local electric circuit, which results in pitting corrosion [20]. The ZrC-20SiC profile demonstrated different colors with an evident corrosion region as shown in Fig.…”

Section: Microstructural Characterizationmentioning

confidence: 96%

Corrosion behavior of ZrC–SiC composite ceramics in LiF–NaF–KF molten salt at high temperatures

Wang

Tang

Fang

et al. 2015

Ceramics International

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“…Nickel-based Hastelloy N alloy has been widely accepted as a promising structural material candidate for molten salt reactor (MSR) systems, due to their excellent corrosion resistance to fluoride salts and high-temperature mechanical properties [ 1 , 2 ]. However, the irradiation-induced void swelling or helium embrittlement caused by helium bubbles will affect their service performances [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Evolution Law of Helium Bubbles in Hastelloy N Alloy on Post-Irradiation Annealing Conditions

Bao

Huang

et al. 2016

Materials

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This work reports on the evolution law of helium bubbles in Hastelloy N alloy on post-irradiation annealing conditions. After helium ion irradiation at room temperature and subsequent annealing at 600 °C (1 h), the transmission electron microscopy (TEM) micrograph indicates the presence of helium bubbles with size of 2 nm in the depth range of 0–300 nm. As for the sample further annealed at 850 °C (5 h), on one hand, a “Denuded Zone” (0–38 nm) with rare helium bubbles forms due to the decreased helium concentration. On the other hand, the “Ripening Zone” (38–108 nm) and “Coalescence Zone” (108–350 nm) with huge differences in size and separation of helium bubbles, caused by different coarsening rates, are observed. The mechanisms of “Ostwald ripening” and “migration and coalescence”, experimentally proved in this work, may explain these observations.

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Effect of moisture on corrosion of Ni-based alloys in molten alkali fluoride FLiNaK salt environments

Cited by 129 publications

References 11 publications

Investigation on static and dynamic corrosion behaviors of thermal energy transfer and storage system materials by molten salts in concentrating solar power plants

Investigation on static and dynamic corrosion behaviors of thermal energy transfer and storage system materials by molten salts in concentrating solar power plants

Corrosion behavior of ZrC–SiC composite ceramics in LiF–NaF–KF molten salt at high temperatures

Evolution Law of Helium Bubbles in Hastelloy N Alloy on Post-Irradiation Annealing Conditions

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