High-temperature corrosion resistance is a big issue for structural materials in molten salt reactors. A simple but effective laser cladding technique has been utilized for producing a compact AlN coating on Hastelloy-N alloy. The results show that the laser-cladded AlN coating improves the compatibility of Hastelloy-N alloy in LiF-NaF-KF molten salt at 900 °C significantly. The uncoated Hastelloy-N alloy is composed of γ-Ni and M₆C phases, showing a typical intergranular corrosion with a precipitation of new Cr₉Mo₂₁Ni₂₀ phase after corrosion. In contrast, the AlN coating exhibits a silghtly unifrom corrosion and protects the Hastelloy-N substrate effectively. The laser-cladded specimes are composed of γ-Ni and AlN before and after corrosion. The possible reasons for the discrepancy in the corrosion behavior between uncoated and coated specimens are discussed in this job.

对于熔融盐反应器中的结构材料而言，耐高温腐蚀是一个大问题。一种简单而有效的激光熔覆技术已被用于在Hastelloy-N合金上生产致密的AlN涂层。结果表明，在900°C下，激光熔覆的AlN涂层显着提高了哈氏合金-N合金在LiF-NaF-KF熔盐中的相容性。未涂层的哈氏合金-N合金由γ-Ni和M ₆ C相组成，显示出典型的晶间腐蚀并析出了新的Cr ₉ Mo ₂₁ Ni ₂₀腐蚀后的相。相比之下，AlN涂层表现出无可比拟的腐蚀效果，并有效地保护了Hastelloy-N基体。激光熔覆试样由腐蚀前后的γ-Ni和AlN组成。在这项工作中讨论了未镀膜和镀膜试样之间腐蚀行为差异的可能原因。