High-temperature corrosion of Cr–Mo steel in molten LiNO3–NaNO3–KNO3 eutectic salt for thermal energy storage

Cheng, Wei-Jen; Chen, Ding-Jhih; Wang, Chaur-Jeng

doi:10.1016/j.solmat.2014.10.007

Cited by 57 publications

(22 citation statements)

References 18 publications

(25 reference statements)

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“…Cheng et al [148] studied the corrosion of Cr-Mo steel at 550 °C for up to 1000h, Wang et al [149] focused on low carbon steel and steel alloy with aluminium coatings at 900°C, and Chatha et al [150] analysed the corrosion of nickel alloys at 750 °C.…”

Section: Fault Prevention and Improvement Techniquesmentioning

confidence: 99%

A review of the application performances of concentrated solar power systems

2019

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The global energy production model is changing from fossil fuels to renewable and nuclear energies. Concentrated solar power is one of the growing technologies that is leading this process. This growth implies the sophistication and size of the systems and, therefore, it requires an increase in maintenance tasks to ensure reliability, availability, maintainability and safety. The aim of this paper is to describe the current context of concentrated solar power, to summarise and analyse the main degradation mechanisms and the main techniques to detect, prevent and mitigate these faults. An exhaustive literature study is presented, considering the most advanced techniques and approaches. A novel qualitative and quantitative analysis of the literature is provided. Finally, the current trends and the future challenges in this field are gathered from this study.

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Section: Fault Prevention and Improvement Techniquesmentioning

confidence: 99%

A review of the application performances of concentrated solar power systems

2019

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“…Henriquez et al [9] have proposed an eutectic ternary nitrate salt with a composition of 30 wt.% LiNO 3 -13 wt.% NaNO 3 -57 wt.% KNO 3 , commonly referred to as (LiNaK)NO 3 , as a candidate nitrate salt. The use of (LiNaK)NO 3 enables an increase in the operating temperature of commercial CSP to 550 • C [10]. On the other hand, it also shows us that the addition of lithium nitrate LiNO 3 in the ternary eutectic mixture (LiNaK)NO 3 , could be one of the most promising solar thermal storage materials due to its excellent thermal properties where, for example, the heating capacity of this mixture is between 14% and 21% more than the commercial solar salt.…”

Section: Introductionmentioning

confidence: 99%

A Materials Screening Test of Corrosion Monitoring in LiNO3 Containing Molten Salts as a Thermal Energy Storage Material for CSP Plants

et al. 2020

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Concentrated solar power (CSP) plants, in the context of thermal energy storage (TES) upgrades, need to provide a timely and effective response to the corrosion process that occurs due to the effect of high temperatures, where one of the main challenges is to control its effect, and thus the costs related to the materials used. Electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR) were applied in this study as a corrosion monitoring technique. The electrochemical tests were carried out on the materials AISI304, AISI430, and HR-224 immersed in a mixture of ternary salt composed of 57 wt.% KNO3 + 13 wt.% NaNO3 + 30 wt.% LiNO3 at 550 °C during 100 h of exposure and subsequently compared with solar salt. The test was also carried out on the VM12 alloy in the ternary salt with lithium content at 100 and 1000 h of exposure at 550 °C. The corrosion tests show that the materials conform to a model of protective layer in which the same results were contrasted with the chemical corrosion mechanism of nitrate mixture. According to the results obtained in this research, electrochemical techniques could be an interesting option to control corrosion in CSP plants and reduce operational risks during operation.

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“…In this context, numerous studies have explored the corrosion behaviour of potential construction materials with different storage media or heat transfer fluids. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] Molten nitrate salt, known as Solar Salt, is the most technologically mature solution for CSP. It consists of 60 wt% NaNO 3 -40 wt%KNO 3 .…”

Section: Introductionmentioning

confidence: 99%

“…A molten ternary salt composed of LiNO 3 -NaNO 3 -KNO 3 was tested with five different steels (SB450, T22, T5, T9 and X20) revealing that corrosion resistance improves with increasing Cr content since it creates a protective layer of (Fe,Cr) 3 O 4 (ref. 17 ). It was found that Li absorbed into the corrosion scales due to the presence of LiNO 3 in the molten salt.…”

Section: Introductionmentioning

confidence: 99%

“…It was found that Li absorbed into the corrosion scales due to the presence of LiNO 3 in the molten salt. 17 Goods and Bradshaw investigated the compatibility of stainless steels SS-304 and SS-316 at 570°C as well as carbon steel A36 at 316°C with several nitrate salts mixtures. 18 In long immersion tests of about 7000 h, the authors reported acceptable corrosion rates even in the presence of some impurities in the salt.…”

Section: Introductionmentioning

confidence: 99%

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A simple method for the inhibition of the corrosion of carbon steel by molten nitrate salt for thermal storage in concentrating solar power applications

et al. 2018

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Corrosion is an important issue in high-temperature applications such as Concentrated Solar Power (CSP) technology, playing a crucial role in the long-term use of storage tanks, heat exchanger and piping materials which account for a considerable component of the investment costs. While there are many studies regarding the corrosion rates of container materials under the conditions of CSP, there is little progress in the field of their degradation prevention by anticorrosion methods. This work presents an analysis of the corrosion mechanisms between the most economical construction material-carbon steel-and molten nitrate salt. A method to protect the carbon steel against corrosion by molten salt at high temperature was proposed, involving the formation of a calcium carbonate layer on the carbon steel surface. The stability of the layer was tested under isothermal and temperature cycling conditions up to 500°C, in both inert and air atmospheres in the presence or absence of humidity. The protection method proposed has potential to reduce investment costs for CSP technology.

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High-temperature corrosion of Cr–Mo steel in molten LiNO3–NaNO3–KNO3 eutectic salt for thermal energy storage

Cited by 57 publications

References 18 publications

A review of the application performances of concentrated solar power systems

A review of the application performances of concentrated solar power systems

A Materials Screening Test of Corrosion Monitoring in LiNO3 Containing Molten Salts as a Thermal Energy Storage Material for CSP Plants

A simple method for the inhibition of the corrosion of carbon steel by molten nitrate salt for thermal storage in concentrating solar power applications

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