Mossbauer effect and Scanning Electron Microscopy were used to investi
gate the effect of immersing the amorphous alloy Fe78B13Si9 in 3%NaCl
solution over different periods and different pH. The results indicate
d that the average angle of orientation of the magnetic moments had in
creased with increasing time of immersion and decrease in pH value. Th
e corrosion product was found to be lepidocrocite (gamma-FeOOH).