Evaluation of flow accelerated corrosion and mechanical performance of martensitic steel T91 for a ternary mixture of molten salts for CSP plants

Mallco, Abdiel; Pineda, Fabiola; Mendoza, Magin; Henríquez, Mauro; Carrasco, Claudia; Vergara, Vicente; Fuentealba, Edward; Fernández, Ángel G.

doi:10.1016/j.solmat.2022.111623

Cited by 12 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The blue cluster is related to thermal energy storage materials. In the green cluster, different keywords related to different types of steel ("martensitic steel" and "ferritic steel") [68][69][70][71][72], and "alloy" [18,[73][74][75][76][77][78][79][80] can be noted. However, "stainless steel" belongs to the second cluster because it is the most common material used for storage structures and relates to the evaluation of corrosion effects by molten salts [18,19,64,67,75,[81][82][83][84][85][86][87][88].…”

Section: Resultsmentioning

confidence: 99%

Bibliometric Map on Corrosion in Concentrating Solar Power Plants

2022

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

Bibliometric Map on Corrosion in Concentrating Solar Power Plants

2022

View full text Add to dashboard Cite

show abstract

“…[190][191][192] Surprisingly, after the seminal work of Atmani and Rameau in 1980, 191,193 who investigated stress-corrosion cracking (SCC) of stainless steel in molten NaCl-CaCl 2 at 840 K utilizing a uniquely designed tensile test apparatus, few groups have aimed at studying the combined impact of mechanical stress and chemical attack under CSP conditions. 194 This research gap, in part, is a result of expected low-stress conditions of CSP or molten salt reactor designs, but localized attack and grain-boundary embrittlement could well be anticipated in service. 195 In research on T91 SCC, 194 tensile tests were carried out at low strain rates (around 10 -6 s −1 ) as calculated from the initial displacement rate in electromechanical test systems.…”

Section: Molten Salt Corrosionmentioning

confidence: 99%

“…194 This research gap, in part, is a result of expected low-stress conditions of CSP or molten salt reactor designs, but localized attack and grain-boundary embrittlement could well be anticipated in service. 195 In research on T91 SCC, 194 tensile tests were carried out at low strain rates (around 10 -6 s −1 ) as calculated from the initial displacement rate in electromechanical test systems. For the corrosion chamber graphite crucibles or Ni-Cr-Mo alloys were employed, which makes direct strain measurement a challenge, if not impossible.…”

Section: Molten Salt Corrosionmentioning

confidence: 99%

Materials properties characterization in the most extreme environments

et al. 2022

View full text Add to dashboard Cite

There is an ever-increasing need for material systems to operate in the most extreme environments encountered in space exploration, energy production, and propulsion systems. To effectively design materials to reliably operate in extreme environments, we need an array of tools to both sustain lab-scale extreme conditions and then probe the materials properties across a variety of length and time scales. Within this article, we examine the state-of-the-art experimental systems for testing materials under extreme environments and highlight the limitations of these approaches. We focus on three areas: (1) extreme temperatures, (2) extreme mechanical testing, and (3) chemically hostile environments. Within these areas, we identify six opportunities for instrument and technique development that are poised to dramatically impact the further understanding and development of next-generation materials for extreme environments. Graphical abstract

show abstract

“…At the same time, many researchers focus on the corrosive effects of molten salts on pipes and containers 27 . Study on corrosion effects helps to understand the material degradation in molten salts, improving the lifetime of CSP plants 28 . Fernández et al 29,30 studied the corrosive effect of nitrate mixtures on various carbon steels.…”

Section: Introductionmentioning

confidence: 99%

“…27 Study on corrosion effects helps to understand the material degradation in molten salts, improving the lifetime of CSP plants. 28 Fernández et al 29,30 studied the corrosive effect of nitrate mixtures on various carbon steels. The experimental results showed that carbon steel produces 32 found that stainless steel AISI 304 and AISI 316 show acceptable corrosion rates after contact with HitecXL salt, even when conditions were humid and a proper protective layer was not formed.…”

mentioning

confidence: 99%

Acceleration of thermal decomposition of molten nitrates by Cr in steel and promotion of this effect by halogens

et al. 2022

View full text Add to dashboard Cite

Molten salts have been widely studied as the most common heat storage medium for concentrated solar power (CSP) plants. However, most studies have focused on the corrosiveness of molten salts, while this study innovatively reveals the role of stainless steel in promoting the decomposition of molten salts and the mechanism by which the halogen ions accelerate this process. Considering commercial Solar Salt as an example, the thermal stability, composition, and thermophysical properties of Solar Salt adding Cl−, Br−, and I− after contacting different stainless steel were analyzed. The results showed that Cr was the main reason for the decomposition of the molten salt, and Cl−, Br−, and I−, all accelerated the decomposition. Meanwhile, different halogen ions promoted the decomposition of molten salts through different mechanisms: oxide layer destruction and chain oxidation.

show abstract

Evaluation of flow accelerated corrosion and mechanical performance of martensitic steel T91 for a ternary mixture of molten salts for CSP plants

Cited by 12 publications

References 34 publications

Bibliometric Map on Corrosion in Concentrating Solar Power Plants

Bibliometric Map on Corrosion in Concentrating Solar Power Plants

Materials properties characterization in the most extreme environments

Acceleration of thermal decomposition of molten nitrates by Cr in steel and promotion of this effect by halogens

Contact Info

Product

Resources

About