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Effects of phosphorus on the stability of the passive state of Fe and Fe‐Ni base glasses
Author(s) -
Viefhaus H.,
Möller R.,
JanikCzachor M.
Publication year - 1988
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.19880391003
Subject(s) - passivation , base (topology) , materials science , phosphorus , substrate (aquarium) , boron , electrolyte , oxide , electrochemistry , inorganic chemistry , analytical chemistry (journal) , metallurgy , chemistry , layer (electronics) , electrode , nanotechnology , environmental chemistry , mathematical analysis , mathematics , organic chemistry , oceanography , geology
The effects of substituting P for B in Fe base and Fe‐Ni base glasses have been investigated. The electrochemical measurements have shown that a substitution of B by P increases the ability of the alloys to passivate and stability of their passive state. Surface analysis with AES revealed that for Fe‐Ni base glasses the main constituents of the passive film were: iron oxides, phosphorus‐oxygen species (mostly phosphates) and boron oxide whereas Ni oxides were depleted. There was a certain similarity between the Auger spectra for phosphorus in the passive film on the glassy substrate and for segregated, and subsequently oxidized, phosphorus on a (100) oriented Fe single crystal. The results suggest, moreover, in agreement with the previous findings for crystalline Fe that the electrolyte components are incorporated into the passivating film on glassy substrates.