Abstract Next-generation concentrated solar power (CSP) plants are expected to work above the current temperature limit of 565 °C for the benefit of enhanced efficiency. This poses significant challenges in the construction materials, among others, in terms of corrosion. In this work, we investigate the spray-graphitization method to improve the compatibility of SS310 and SS347 with molten Li2CO3-Na2CO3-K2CO3 carbonate salt. Improved compatibility was observed due to the formation of protective carbonate or carbide layers on SS347 and SS310 surfaces, respectively. Detailed characterization of the corrosion products, including chemical reactions and wettability allowed the mechanism of anticorrosion protection to be proposed, which could be used for other construction materials in direct contact with high-temperature molten salts for next-generation CSP plants and beyond.

中文翻译：

---

通过聚光太阳能建筑材料的石墨化抑制熔融 Li2CO3-Na2CO3-K2CO3 盐的热腐蚀

摘要 下一代聚光太阳能 (CSP) 发电厂有望在当前 565 °C 的温度限制以上工作，以提高效率。这对建筑材料提出了重大挑战，尤其是在腐蚀方面。在这项工作中，我们研究了喷雾石墨化方法，以提高 SS310 和 SS347 与熔融 Li2CO3-Na2CO3-K2CO3 碳酸盐的相容性。由于在 SS347 和 SS310 表面分别形成了保护性碳酸盐或碳化物层，因此观察到改进的相容性。腐蚀产物的详细表征，包括化学反应和润湿性，允许提出防腐保护机制，