Abstract
The corrosion mode and passivation behavior of Fe60(P0.3C0.7)40 and Fe83(P0.3C0.7)17 ribbons (Fe60 and Fe83) in 0.6 M NaCl were studied using various techniques. The decrement of P and C could weaken the glass formation ability (GFA) and raise the liquidus temperature of the alloys. Electrochemical noise (EN) and microstrucure investigations show that Fe60 exhibits a local corrosion mode and forms a stable and dense passivation film with a higher corrosion resistance, and Fe83 displays a combination of local and global corrosion modes and has a lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film have a significant impact on improving the corrosion resistance of Fe-based glassy alloys.
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