Soft magnetic alloy Fe_83.3Si_xB_16-xCu_0.7 (x = 0, 1, 2, 3 and 4) ribbons were produced by the single roller melt spinning method. The Si content dependence of magnetic properties and corrosion resistance was investigated. Appropriate addition of Si is effective to the improvement of thermal stability, soft magnetic properties and corrosion resistance in this alloy system. Excellent soft magnetic properties with low coercivity 3.1 A/m and high magnetic flux density 1.66 T can be obtained when x = 1 annealed at 365 °C for 10 min. Compared with the Si-free ribbon, the corrosion resistance of the x = 1 alloy ribbon is also improved. The X-ray photoelectron spectroscopy (XPS) indicates that the formation of an SiO₂-enriched passive film is mainly responsible for the high corrosion resistance of Si-containing (x = 1) alloy in 3.5 wt% NaCl solution. Low cost of raw materials, high thermal stability, good soft magnetic properties as well as excellent corrosion resistance make this alloy a promising candidate for future application.

软磁合金 Fe _83.3 Si _x B _16-x Cu _0.7 (x = 0, 1, 2, 3 和 4) 带是通过单辊熔纺法生产的。研究了磁性和耐腐蚀性的Si含量依赖性。适当添加Si对提高该合金体系的热稳定性、软磁性能和耐腐蚀性能是有效的。当 x = 1 在 365 °C 下退火 10 分钟时，可以获得具有低矫顽力 3.1 A/m 和高磁通密度 1.66 T 的优异软磁性能。与不含Si的薄带相比，x=1合金薄带的耐腐蚀性能也有所提高。X 射线光电子能谱 (XPS) 表明 SiO ₂的形成- 富集钝化膜是含硅 (x = 1) 合金在 3.5 wt% NaCl 溶液中具有高耐腐蚀性的主要原因。原材料成本低、热稳定性高、软磁性能好以及优异的耐腐蚀性使该合金成为未来应用的有希望的候选者。