Corrosion resistance of alumina forming alloys against molten chlorides for energy production. II: Electrochemical impedance spectroscopy under thermal cycling conditions

Vidal, Judith; Fernández, Ángel G.; Tirawat, Robert; Turchi, Craig; Huddleston, Wm. E.

doi:10.1016/j.solmat.2017.03.025

Cited by 67 publications

(24 citation statements)

References 26 publications

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“…The lowest dwelling time of 4 h was used only at 1000°C based on previous tests. 4,5 These temperatures and times were selected following energy cost considerations if preoxidation of alloys is used to protect the alloys from corrosion in molten salts at commercial scale.…”

Section: Resultsmentioning

confidence: 99%

“…We are investigating corrosion in molten salts at high temperatures for solar applications and its mitigation to obtain degradation of containment materials around 20 µm/yr or lower, thus providing a lifetime for CSP plants of 30 years or more. [3][4][5][6][7][8][9] Corrosion behavior of steel containers in latent TES molten eutectic KCl-LiCl from 310 to 420°C in air and argon has been evaluated with the long-term weight-loss technique for up to 4000 h of immersion. The effect of water and other impurities in the salt were also studied, with pitting corrosion detected and the addition of 2 wt% H 2 O causing a severe increase in corrosion in these environments.…”

Section: Introductionmentioning

confidence: 99%

“…13 Several alloys have been tested in molten chlorides systems for high-temperature solar thermal applications. [3][4][5][6][7] Stainless steels AISI 347 (347SS) and AISI 310 (310SS), Incoloy 800 H (In800H), and Inconel 625 (IN625) were tested in molten eutectic 34.42 wt% NaCl -65.58 wt% LiCl at 650 and 700°C in nitrogen atmosphere. 3 At 650°C, the lowest corrosion rate of 2800 ± 380 µm/yr was obtained for IN625.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion resistance of MCrAlX coatings in a molten chloride for thermal storage in concentrating solar power applications

Vidal

2017

npj Mater Degrad

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Corrosion evaluations of Incoloy 800 H (In800H) and stainless steel AISI 310 (310SS), in bare and coated conditions, were performed in 34.42 wt% NaCl-55.47 wt% KCl at 700°C in a nitrogen atmosphere. This NaCl-KCl composition has a melting point of 657°C, which makes it suitable for latent-heat thermal energy storage in concentrating solar power applications. Several nickel-based MCrAlX coatings were tested, where M = Ni and/or Co and X = Y, Ta, Hf, and/or Si. Electrochemical testing was carried out to determine corrosion rates. The bare In800H and 310SS alloys corroded rapidly (~2500 and 4500 µm/yr, respectively, assuming uniform corrosion). Concentrating solar power plants need containment materials with a lifetime of at least 30 years; thus, these corrosion rates are excessive. Corrosion mitigation approaches are being investigated to obtain degradation on the order of 20 µm/ yr or lower. The lowest corrosion rate of 190 µm/yr was obtained for atmospheric plasma spray NiCoCrAlY coatings pre-oxidized in air at 900°C for 24 h with a heating/cooling rate of 0.5°C/min. Metallographic characterization of the corroded surfaces showed that the formation of a uniform thin alumina scale before exposure to the molten chloride system considerably reduced the corrosion of the alloy. However, the rates of corrosion determined herein are considerable, highlighting the relevance of testing materials durability in solar power applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Corrosion resistance of MCrAlX coatings in a molten chloride for thermal storage in concentrating solar power applications

Vidal

2017

npj Mater Degrad

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“…Chloride and carbonate salt blends have been proposed and tested, but coming after new challenges . The corrosion mechanisms of candidate salts and corresponding mitigation approaches are still an area of ongoing which are badly needed for component designers . Nickel alloys are decided to be adopted in the receiver and TES, as shown in Table .…”

Section: Sco2 Power Cycles Integrated With Cspmentioning

confidence: 99%

“…[124][125][126] The corrosion mechanisms of candidate salts and corresponding mitigation approaches are still an area of ongoing which are badly needed for component designers. [127][128][129][130][131] Nickel alloys are decided to be adopted in the receiver and TES, as shown in Table 7. Compared with molten salt, particle as heat carrier is cheaper and more stable at high temperatures.…”

Section: Current Research To the Integration Of Sco 2 With Cspmentioning

confidence: 99%

Review of supercritical CO₂power cycles integrated with CSP

Yin

Zheng²,

Peng

et al. 2019

Int J Energy Res

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Summary Increasing demand of electricity and severer concerns to environment call for green energy sources as well as efficient energy conversion systems. SCO2 power cycles integrated with concentrating solar power (CSP) are capable of enhancing the competitiveness of thermal solar electricity. This article makes a comprehensive review of supercritical CO2 power cycles integrated with CSP. A detailed comparison of four typical CSP technologies is conducted, and the cost challenge of currently CSP technologies is pointed out. The thermophysical properties of sCO2 and the corresponding two real gas effects are analyzed elaborately to express the features of sCO2 power cycles. An extensive review of sCO2 layouts relevant for CSP including 12 single layouts and 1 combined layout is implemented logically. Strengths and weaknesses of sCO2 power cycles over traditional steam‐Rankine cycle generally adopted in current CSP plants are concluded, followed by metal material degration summary in CSP relevant temperature sCO2 environment, which shows that the nickel‐based alloy is a proper structural material candidate for sCO2‐CSP integration. Thermodynamic analyses of sCO2 power cycles when integrated with CSP are divided into three level of which design‐point analysis and off‐design modeling are conducted and compared, more researches into the off‐design point analysis, dynamic modeling, especially the transient behavior are suggested. Economic analysis of the integrated system is concluded and presents a considerable levelized cost of electricity reduction of 15.6% to 67.7% compared to that of state of art CSP. Taking the thermodynamic and economic analysis into consideration, target designs of sCO2 power cycles for CSP are summarized in three aspects. Finally, current theoretical and experimental researches of sCO2 power cycles integrated with CSP for market penetration are introduced. The strengths, weaknesses, and potential solutions to the gaps of three potential pathways (molten salt pathway, particle pathway, and gas phase pathway) to realize the integration of sCO2 power cycles in the next CSP generation plants up to 700°C are reviewed. In general, the integration of sCO2 power cycles with CSP technologies exhibits promising expectations for facilitating the competitiveness of thermal solar electricity.

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Corrosion of a Nickel-Based Alumina-Forming Alloy in Molten NaCl–MgCl2 at 600 °C For the Development of a Molten Salt Nuclear Reactor

Pellicot,

Gruet,

Serp

et al. 2024

High Temperature Corrosion of mater.

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Corrosion resistance of alumina forming alloys against molten chlorides for energy production. II: Electrochemical impedance spectroscopy under thermal cycling conditions

Cited by 67 publications

References 26 publications

Corrosion resistance of MCrAlX coatings in a molten chloride for thermal storage in concentrating solar power applications

Corrosion resistance of MCrAlX coatings in a molten chloride for thermal storage in concentrating solar power applications

Review of supercritical CO₂power cycles integrated with CSP

Corrosion of a Nickel-Based Alumina-Forming Alloy in Molten NaCl–MgCl2 at 600 °C For the Development of a Molten Salt Nuclear Reactor

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Corrosion resistance of alumina forming alloys against molten chlorides for energy production. II: Electrochemical impedance spectroscopy under thermal cycling conditions

Cited by 67 publications

References 26 publications

Corrosion resistance of MCrAlX coatings in a molten chloride for thermal storage in concentrating solar power applications

Corrosion resistance of MCrAlX coatings in a molten chloride for thermal storage in concentrating solar power applications

Review of supercritical CO2power cycles integrated with CSP

Corrosion of a Nickel-Based Alumina-Forming Alloy in Molten NaCl–MgCl2 at 600 °C For the Development of a Molten Salt Nuclear Reactor

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Review of supercritical CO₂power cycles integrated with CSP