On the anticorrosion mechanism of molten salts based nanofluids
On the anticorrosion mechanism of molten salts based nanofluids
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基于熔盐的纳米流体的防腐机理
DOI：
10.1016/j.solmat.2021.111424
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发表时间：
2022-01
影响因子：
6.9
通讯作者：
Iker Camacho;Qicheng Chen;L. González-Fernández;O. Bondarchuk;L. Bartolomé;Zhu Jiang;Yulong Ding
中科院分区：
文献类型：
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作者：
Iker Camacho;Qicheng Chen;L. González-Fernández;O. Bondarchuk;L. Bartolomé;Zhu Jiang;Yulong Ding
随着可再生能源成为未来能源的主要候选者，高效的储能被认为是释放其全部潜力的关键。在这种情况下，热能储存（TES），特别是基于熔盐的TES，被认为是一种有效、简单和低成本的选择。这种技术的主要缺点之一是在高温下储存盐的容器的腐蚀。最近，据报道，添加纳米粒子能够减轻熔融盐的腐蚀性，由几个独立的基团。然而，迄今为止，对于为什么会发生这种行为还没有令人信服的解释。在这项工作中，我们试图通过实验和分子动力学模拟给出一个新的见解熔盐的抗腐蚀性能掺杂纳米粒子（熔盐纳米流体）。XPS-深度剖析，SEM-EDX和XRD实验以及宏观和原子模型在这项工作中使用，结果表明，纳米粒子在高温下扩散到建筑材料中是熔盐纳米流体的腐蚀减缓机制之一。这一新发现可以解释一些报道的腐蚀结果，从而为熔盐和其他高温应用的新防腐策略铺平了道路。
With renewables as the main candidate for future energy sources, efficient energy storage is considered a key to unlock its full potential. In this context, thermal energy storage (TES), particularly molten salt-based TES, is considered as an efficient, simple and a low-cost option. One of the main drawbacks for this technology is the corrosion of vessels storing the salt at elevated temperatures. Recently, the addition of nanoparticles has been reported to be able to mitigate the corrosivity of molten salts by several independent groups. However, no convincing explanation has been established so far as to why such behaviour takes place. In this work, we attempt to give a new insight into anticorrosion performance of molten salts dopped with nanoparticles (molten salts nanofluids) both experimentally and through Molecular Dynamic simulations. XPS-depth profiling, SEM-EDX and XRD experiments together with macroscopic and atomistic modelling were used in this work and the results suggest that the diffusion of nanoparticles into construction materials at high temperatures is one of the corrosion mitigation mechanisms of molten salts nanofluids. This new finding allows the explanation of some of the reported corrosion results and hence paves the way for a new anticorrosion strategy for molten salts and other high-temperature applications.