Abstract
AbstractElectrochemical behavior of Fe80B20 glassy ribbons with thickness varying from 12 μm up to 30 μm has been investigated. Within the active dissolution region and passivation potential region all the ribbons exhibited the same anodic behavior. There were, however, large differences in the stability of the passive state; the thicker the ribbon (and, what follows, the broader the cooling profile) the less stable the passive state. SEM examinations together with KEVEX and SAM analysis revealed some localized chemical heterogeneities at the shiny side of the thicker ribbons. These were apparently the sources of weak spots within the passivating film.
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