机械应力对熔盐高温腐蚀的影响

SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems Pub Date : 2019-07-26 DOI:10.1063/1.5117720

S. Bell, D. Stoker, G. Will, T. Steinberg

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引用次数: 1

摘要

熔盐储能系统安全壳材料的腐蚀是影响系统寿命的重要因素。迄今为止，关于机械应力对熔盐高温腐蚀行为的影响的工作数量有限。本文提出了一种研究机械应力对Na2CO3/NaCl和Na2SO4/NaCl共晶盐高温腐蚀行为影响的方法。结果比较表明，应力导致了更大程度的腐蚀。在Na2SO4/NaCl中，应力导致整个金属样品被氧化。一种可能的机制是通过晶界向内硫化。未来的详细工作应进一步表征和量化应力对熔盐高温腐蚀的影响。

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Effects of mechanical stress on high temperature corrosion in molten salt

Corrosion of molten salt thermal energy storage system containment materials is an important factor for system lifetime. To date there is a limited volume of work on the effects of mechanical stress on high temperature corrosion behaviour in molten salts. This study presents a method for investigating the effects of mechanical stress on the high temperature corrosion behaviour in Na2CO3/NaCl and Na2SO4/NaCl eutectic salts. Comparison of the results indicated stress resulted in a greater level of corrosion. In Na2SO4/NaCl the stress resulted in oxidation through the entire metal sample. A possible mechanism for this is inward sulphidation via grain boundaries. Future detailed work should be performed to further characterise and quantify the effects of stress on high temperature corrosion in molten salt.

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SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems

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