Effect of the potential on the film composition and the stress corrosion cracking of mild steel in ammonium nitrate solutions

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creativework.keywordsMild steel, Mossbauer spectroscopy, Nitrate solutions, Stress corrosion cracking
creativework.publisherUniversity of Chemical Technology and Metallurgyjournal@uctm.eduen
dc.contributor.authorIvanova D.I.
dc.contributor.authorFachikov L.B.
dc.date.accessioned2024-07-16T11:16:48Z
dc.date.accessioned2024-07-16T11:18:51Z
dc.date.available2024-07-16T11:16:48Z
dc.date.available2024-07-16T11:18:51Z
dc.date.issued2018-01-01
dc.description.abstractThe relation between the film composition and the susceptibility of mild steel (0.17% C) to stress corrosion cracking (SCC) in ammonium nitrate solutions at different potentials has been studied. The susceptibility to SCC is evaluated by constant slow strain rate tests under potentiostatic conditions (-0.5 V - 1.5 V, SCE). The composition of the surface film is identified by Mossbauer spectroscopy. It is found that in the region of the highest susceptibility to SCC (0 V - 0.8 V, SCE) the film is composed mainly of fine particles of FeOOH as well as some quantity of γ-Fe2O3. However at potentials outside this region, where the resistance of the steel to SCC increases considerably, the film is composed exclusively by oxides with a spinel structure Fe3O4 and γ-Fe2O3. It is suggested that the conditions which favour the formation of a spinel structure film may lead to an increased resistance of the steel to SCC.
dc.identifier.issn1314-7978
dc.identifier.issn1314-7471
dc.identifier.scopusSCOPUS_ID:85047391538en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/1212
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85047391538&origin=inward
dc.titleEffect of the potential on the film composition and the stress corrosion cracking of mild steel in ammonium nitrate solutions
dc.typeArticle
oaire.citation.issue4
oaire.citation.volume53
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