Monophasic Al₅₀Ni₅₀ ribbons were fabricated by melt spinning at circumferential speeds (S_c) of 21 and 42 m/s, and subsequently annealed at various temperatures. The microstructure and corrosion behavior of ribbons were studied through various experimental methods. With increasing S_c, the as-spun and annealed ribbons at 42 m/s show a higher (100) crystal orientation factor F₍₁₀₀₎, a lower barrier to recrystallization and a higher total film resistance than the counterparts with 21 m/s. The as-spun ribbon at 42 m/s demonstrated a denser and more stable Al₂O₃ passive film compared to the as-spun and annealed ribbons at 21 m/s. This improvement in passive film can be further enhanced by 700 °C annealing. Therefore, the corrosion resistance of AlNi ribbons can be improved by increasing S_c and additional annealing at an appropriate temperature.