Co-firing a low amount of biomass together with coal creates a severely corrosive environment in the presence of moisture which in turn causes high-temperature corrosion of boiler parts. This study focuses on the corrosion resistance of high-velocity oxy-fuel (HVOF) sprayed Inconel 625 and Inconel 718 coatings on T22 boiler steel exposed to 40 wt.% Na₂SO₄ + 40 wt.% K₂SO₄ + 10 wt.% KCl + 10 wt.% NaCl atmosphere for 50 cycles at 700 °C under cyclic conditions. Various characterization techniques like scanning electron microscopy/energy-dispersive spectroscopy (SEM/EDS), x-ray diffraction (XRD) and x-ray mapping have been used to study corrosion products. The uncoated T22 boiler steel underwent severe weight gain and spallation resulting in poor corrosion resistance in molten salt environment which may be due to development of unprotective oxides. Both Ni-based metallic coatings exhibited better corrosion resistance. HVOF sprayed Inconel 625 samples outperformed in molten salt environment in comparison with HVOF sprayed Inconel 718 which may be attributed to lower amount of Cr and Ni and high amount of Fe present in the composition of Inconel 718.

将少量生物质与煤共烧会在存在水分的情况下产生严重的腐蚀环境，进而导致锅炉部件的高温腐蚀。_{本研究的重点是在暴露于 40 wt.% Na 2} SO ₄  + 40 wt.% K ₂ SO ₄的 T22 锅炉钢上高速氧燃料 (HVOF) 喷涂 Inconel 625 和 Inconel 718 涂层的耐腐蚀性。 + 10 wt.% KCl + 10 wt.% NaCl 气氛，在循环条件下在 700 °C 下进行 50 个循环。各种表征技术，如扫描电子显微镜/能量色散光谱 (SEM/EDS)、X 射线衍射 (XRD) 和 X 射线映射已被用于研究腐蚀产物。未涂层的 T22 锅炉钢经历了严重的重量增加和剥落，导致在熔盐环境中的耐腐蚀性差，这可能是由于形成了非保护性氧化物。两种镍基金属涂层都表现出更好的耐腐蚀性。与 HVOF 喷涂的 Inconel 718 相比，HVOF 喷涂的 Inconel 625 样品在熔盐环境中的表现优于 HVOF 喷涂的 Inconel 718，这可能是由于 Inconel 718 成分中存在的 Cr 和 Ni 含量较低以及 Fe 含量较高。