Electrochemical study of the corrosion of a Ni-based alloy GH3535 in molten (Li,Na,K)F at 700°C

Wang, Yanli; Liu, Huijun; Yu, Ge; Hou, Juan; Zeng, Chaoliu

doi:10.1016/j.jfluchem.2015.06.014

Cited by 57 publications

(32 citation statements)

References 11 publications

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“…Due to this enhanced property, the molten-salt technology is rising the efficiency and storage capacity of concentrated solar power plants while falling solar thermal energy costs. The molten salt is used as a heat-transfer fluid (HTF) and thermal energy storage (TES) in solar power plants [9][10][11][12]. Several other methods may be employed to improve the properties of any composite materials [13,14].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Hot Corrosion Behaviour of Inconel 625 and Incoloy 800H Superalloys with YSZ‐Thermal Barrier Coating Under High‐Temperature Environment for Bioreactor Applications

Hariharan

Anderson

Praveenkumar

et al. 2022

Journal of Nanomaterials

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Thermal energy storage is one of the promising technologies in the modern era for balancing the peak power demand without emitting much emission. Molten-salt technology plays a dominant role among the varieties of thermal energy storage systems. The difficulty in storing the molten-salt technology requires a storage material with high temperature, corrosion, and oxidation resistance properties. The nickel-based superalloys such as Inconel 625 and Incoloy 800H possess the desired properties to be used as a storage material for the molten salts. In this present work, the Incoloy 800H and Inconel 625 superalloy specimens were taken up for investigation. The specimens were coated with yttria-stabilized zirconia as a thermal barrier coating using a plasma spray process. The sodium chloride and potassium chloride molten salts with a weight fraction of 7 : 3 have been taken with both uncoated and YSZ-coated specimens, and specimens were heated up to 1000°C approximately. The specimens were heated for different hours such as 8, 12, and 16 hours, respectively. The increase in heating time also results in the increase in the tensile property of the specimens. The mechanical testing, such as tensile test and hardness test, was performed to comprehend the mechanical properties. Scanning electron microscope images and X-ray diffraction analysis were made to study the microstructural properties and the corrosion resistance property. From the test results, YSZ-coated specimens possess high corrosion resistance and high mechanical strength compared to the uncoated specimens.

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Section: Introductionmentioning

confidence: 99%

Investigation on Hot Corrosion Behaviour of Inconel 625 and Incoloy 800H Superalloys with YSZ‐Thermal Barrier Coating Under High‐Temperature Environment for Bioreactor Applications

Hariharan

Anderson

Praveenkumar

et al. 2022

Journal of Nanomaterials

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“…[1][2] . GH3535 alloy processes high-temperature stablity and corrosion resistance, therefore, it has been used as a main structural material of the TMSR [3][4] . The manufacture of the reactor requires a lot of welding, and the integrity of the weld determins the reliability of the reactor.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Inspection Technology of GH3535 Alloy Butt Weld With Linear Array Probe

et al. 2021

Preprint

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The critical problem to accurately characterizing defects in GH3535 alloy weld is the deflection of the acoustic beam and scattering due to the coarse columnar grains. Signal-to-noise ratio is an important index to indicate whether the grain scattering is severein the ultrasonic inspection. In this paper, the phased array ultrasonic testing of GH3535 alloy butt weld was studied using sector scan mode with linear array probe. The soundfield characteristics of the linear array probe with different focusing parameters were analyzed, and the signal-to-noise ratio in the detection was calculated. The results show that: the acoustic beam of the linear array probe can cover the weld,based on the removal of weld reinforcement. The signal-to-noise ratio of transverse hole with φ3mm located at the weld-fusion lineis more than 15dB, when the front end ofthe probe is located directly above the transverse hole of weld-fusion line.

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“…With this aim, cathodic protection has been proposed in the literature [2,3] to mitigate corrosion of alloys in molten salts, using a sacrificial metal that more easily "corrodes" is used to prevent corrosion of the alloy or its components. It was shown that the major corrosion mechanism of alloys in molten salts is the selective oxidation of chromium [4]. It usually occurs at the grain boundaries [5,6].…”

Section: Introductionmentioning

confidence: 99%

Cathodic Protection Using Aluminum Metal in Chloride Molten Salts as Thermal Energy Storage Material in Concentrating Solar Power Plants

Fernández

Cabeza

2020

Applied Sciences

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The new generation of concentrated solar power (CSP) plants to be developed presents a great challenge related to the increase in maximum operating temperature since molten salt CSP technologies require alternative salt chemistries such as chloride. The cathodic protection strategy involves the addition of a sacrificial metal to prevent corrosion of the alloy tested as container material in a CSP plant. In this paper, aluminum (Al) metal was analyzed as a corrosion inhibitor in OCT and HR224 alloys, obtaining corrosion rates of 4.37 and 0.27 mm/y, respectively. It has been confirmed that the use of Al metal can reduce the anodic current which is directly related to the corrosion rate. The formation of protective alumina scales (Al2O3) was assessed by scanning electron microscopy (SEM) and X-ray diffraction (XRD), confirming the corrosion model results from electrochemical impedance spectroscopy monitoring tests.

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Electrochemical study of the corrosion of a Ni-based alloy GH3535 in molten (Li,Na,K)F at 700°C

Cited by 57 publications

References 11 publications

Investigation on Hot Corrosion Behaviour of Inconel 625 and Incoloy 800H Superalloys with YSZ‐Thermal Barrier Coating Under High‐Temperature Environment for Bioreactor Applications

Investigation on Hot Corrosion Behaviour of Inconel 625 and Incoloy 800H Superalloys with YSZ‐Thermal Barrier Coating Under High‐Temperature Environment for Bioreactor Applications

Investigation on the Inspection Technology of GH3535 Alloy Butt Weld With Linear Array Probe

Cathodic Protection Using Aluminum Metal in Chloride Molten Salts as Thermal Energy Storage Material in Concentrating Solar Power Plants

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