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Effect of glassy ribbon thickness on its anodic behavior
Author(s) -
Möuller R.,
Viefhaus H.,
JanikCzachor M.
Publication year - 1987
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19870380605
Subject(s) - ribbon , passivation , dissolution , materials science , anode , composite material , chemical engineering , electrode , chemistry , layer (electronics) , engineering
Electrochemical behavior of Fe 80 B 20 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.