Abstract The corrosion of materials is a great challenge for the application of a molten salt nuclear reactor using molten fluoride salts with dissolved fissile material as fuel or using clean molten salts to cool solid nuclear fuel. Temperature gradient is one of the main driving forces. In present investigation, the corrosion of Cr and alloy GH3535 in molten (Li,Na,K)F with the temperature gradients of 600–700 and 650–700 °C is investigated. The experimental results indicate that the difference in the temperature of the melt causes the difference of the corrosion potential, and thus leads to the occurrence of galvanic corrosion. The corrosion of hot-end samples is accelerated, with a higher effectiveness for a higher temperature gradient.

中文翻译：

---

温度梯度对熔融氟化物中材料腐蚀的影响

摘要 材料的腐蚀对于以溶解易裂变材料的熔融氟化盐为燃料或使用清洁熔融盐冷却固体核燃料的熔盐核反应堆的应用是一个巨大的挑战。温度梯度是主要驱动力之一。在目前的研究中，Cr 和合金 GH3535 在熔融 (Li,Na,K)F 中的腐蚀研究，温度梯度为 600–700 和 650–700 °C。实验结果表明，熔体温度的差异导致腐蚀电位的差异，从而导致电偶腐蚀的发生。热端样品的腐蚀加速，对更高的温度梯度具有更高的效率。