Corrosion monitoring of 321H in contact with a quaternary molten salt for parabolic trough CSP plants

Encinas-Sánchez, V.; Lasanta, María Isabel; Miguel, María Teresa de; García-Martín, Gustavo; Pérez, F.J.

doi:10.1016/j.corsci.2020.109070

Cited by 16 publications

(8 citation statements)

References 47 publications

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“…Lasanta, M.T. de Miguel, and V. Encinás-Sanchez [42][43][44][45][46][47][48][49][50][51]. One of the most recent studies published was a study on the corrosion resistance of austenitic steel HR3C to a carbonate molten salt [52].…”

Section: Resultsmentioning

confidence: 99%

Bibliometric Map on Corrosion in Concentrating Solar Power Plants

2022

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Concentrating solar power (CSP), also known as solar thermal electricity (STE), is increasing its deployment worldwide. One of the potential ways to decrease costs in CSP plants is the improvement of corrosion resistance between the heat transfer fluid (HTF) and storage materials, and the materials used for pipes, tanks, containers, and receivers. This paper assesses the literature on this topic (290 publications) through a bibliometric analysis, identifying the trends of the research, the topics of most interest to researchers, and literature gaps. Most documents are from Spain, Germany, and the United States of America. Results show that the most recent approaches for corrosion migration are selective coatings and the use of nanoparticles to reduce corrosiveness. The use of nitrates is changing to other salts such as chloride mixtures and potassium compounds. In addition, the techniques used to evaluate corrosion results are dominated by scanning electron microscopy (SEM), X-ray diffraction (XRD), and electrochemical testing, but new dynamic techniques are starting to be used, representing the biggest gap that needs to be filled for the testing of components such as solar receivers.

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Section: Resultsmentioning

confidence: 99%

Bibliometric Map on Corrosion in Concentrating Solar Power Plants

2022

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“…Apart from this, the evaluation of the corrosion behavior of SS in molten nitrate salts containing high‐content chloride impurity is limited. There are few investigations on the corrosion behavior of austenitic SS in molten nitrate salts containing chloride higher than 1 wt% by electrochemical measurements, especially electrochemical impedance spectroscopy (EIS), which is regarded as the effective and reliable technique for corrosion monitoring in CSP plants according to Encinas‐Sánchez et al [ 16 ]…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, electrochemical techniques have been widely used in the study of molten salt corrosion, [ 16–22 ] and have been proved to be effective in understanding corrosion mechanisms, kinetics, and corrosion process. Fernández et al [ 23 ] investigated the positive effect of alumina‐forming on corrosion behavior of austenitic stainless steel using EIS method in molten nitrate salts.…”

Section: Introductionmentioning

confidence: 99%

“…The corrosion processes were controlled by inner diffusion of oxidant and outer diffusion of metal cations at relatively lower temperatures (450°C and 600°C) and the diffusion of oxidant in molten salts at relatively higher temperatures (680°C). Encinas-Sánchez et al [16,21] studied the possibility of using EIS as the corrosion monitoring technology in the CSP system and compared the corrosion rates obtained from EIS measurements and isothermal tests. However, to the best of our knowledge, few investigations were performed to study the impact of chloride impurity on the corrosion process of SS using electrochemical methods, especially in the molten nitrate salts containing highcontent chloride impurity.…”

mentioning

confidence: 99%

“…Apart from this, the evaluation of the corrosion behavior of SS in molten nitrate salts containing high-content chloride impurity is limited. There are few investigations on the corrosion behavior of austenitic SS in molten nitrate salts containing chloride higher than 1 wt% by electrochemical measurements, especially electrochemical impedance spectroscopy (EIS), which is regarded as the effective and reliable technique for corrosion monitoring in CSP plants according to Encinas-Sánchez et al [16] Furthermore, electrochemical techniques have been widely used in the study of molten salt corrosion, [16][17][18][19][20][21][22] and have been proved to be effective in understanding corrosion mechanisms, kinetics, and corrosion process. Fernández et al [23] investigated the positive effect of alumina-forming on corrosion behavior of austenitic stainless steel using EIS method in molten nitrate salts.…”

mentioning

confidence: 99%

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Impact of NaCl impurity on corrosion of 316 L steel in molten nitrate salts for thermal energy storage: An electrochemical study

Wang

Feng

et al. 2022

Materials & Corrosion

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The impact of NaCl impurity on corrosion of stainless steel (SS) 316 L in binary nitrate salts (60 wt% NaNO 3 + 40 wt% KNO 3 ) was systematically investigated at 565°C via electrochemical measurements. SS 316 L exhibits active dissolution behavior in salts containing 0-1.4 wt% NaCl. The influence of NaCl impurity shows a strong time dependence according to the negligibly affected corrosion current density obtained from a short-time potentiodynamic polarization sweep. The corrosion process of 316L in salts with NaCl-free is controlled by ions transport through the oxide layer. With the presence of NaCl impurity, it is controlled by higher rate of ions transport and the diffusion of metal chlorides. The alternation in basicity in the corrosion front caused by chloride ions increases the solubility of chromium oxide and hence the dissolution of chromium oxide, which can lead to the formation of a less protective oxide layer.

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Enhancing Corrosion Resistance of Stainless Steel by Hot-Dip Aluminizing for High-Temperature Solar Thermal Application

Sah¹,

Nishikata²

2022

CO2 Free Ammonia as an Energy Carrier

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Corrosion monitoring of 321H in contact with a quaternary molten salt for parabolic trough CSP plants

Cited by 16 publications

References 47 publications

Bibliometric Map on Corrosion in Concentrating Solar Power Plants

Bibliometric Map on Corrosion in Concentrating Solar Power Plants

Impact of NaCl impurity on corrosion of 316 L steel in molten nitrate salts for thermal energy storage: An electrochemical study

Enhancing Corrosion Resistance of Stainless Steel by Hot-Dip Aluminizing for High-Temperature Solar Thermal Application

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