NiCoCrAlYSiHf coating was prepared for the surface of the 3039 Ni-based superalloy. The coating was prepared via arc ion plating, and it was modified using a high-current pulsed electron beam (HCPEB) technique. The effects that HCPEB irradiation had on the hot corrosion properties of the NiCoCrAlYSiHf bonding layer at 900 °C with mixed salt (75 wt% Na2SO4 + 25 wt% K2SO4) were studied. The results showed that after HCPEB irradiation, the defects on the surface of the original coating disappeared, and then the surface remelted. Y-enriched Al2O3 particles formed on the surface after 30 irradiation treatments. The results of the hot corrosion test showed that the original coating had poor hot corrosion resistance and severe spalling of corrosion products and that internal oxidation occurred. A continuous and dense Al2O3 film was expected in the molten salt of the irradiated coating, and this effectively blocked further corrosion of the coating. The results showed that HCPEB irradiation promoted rapid formation of a protective oxide film on the surface of the coating and significantly improved the hot corrosion resistance of the NiCoCrAlYSiHf coating.

中文翻译：

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高电流脉冲电子束电弧离子镀NiCoCrAlYSiHf涂层的热腐蚀行为

为3039镍基高温合金表面制备了NiCoCrAlYSiHf涂层。该涂层通过电弧离子镀制备，并使用高电流脉冲电子束 (HCPEB) 技术对其进行改性。研究了 HCPEB 辐照对 NiCoCrAlYSiHf 键合层在 900 °C 与混合盐（75 wt% Na2SO4 + 25 wt% K2SO4）的热腐蚀性能的影响。结果表明，HCPEB辐照后，原涂层表面缺陷消失，表面重新熔化。经过 30 次辐照处理后，在表面形成了富含 Y 的 Al2O3 颗粒。热腐蚀试验结果表明，原始涂层抗热腐蚀能力差，腐蚀产物剥落严重，发生内部氧化。预期在辐照涂层的熔盐中形成连续致密的 Al2O3 膜，这有效地阻止了涂层的进一步腐蚀。结果表明，HCPEB辐照促进了涂层表面保护性氧化膜的快速形成，显着提高了NiCoCrAlYSiHf涂层的抗热腐蚀性能。