On the Mechanism of Oxide Films Formation on Pearlitic Steels in Nitrate Solutions

On the Mechanism of Oxide Films Formation on Pearlitic Steels in Nitrate Solutions

During exposing pearlitic steels to nitrate solutions, three mechanisms of iron transfer from the metal phase into solution are observed, depending on the solution pH and the presence of oxidants. The process yields either bivalent iron, colloid-disperse compounds of trivalent iron, or a lepidocroci...

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Bibliographic Details
Published in:Protection of metals and physical chemistry of surfaces Vol. 39; no. 6; p. 560
Main Authors: Prozorov, V V, Gusarov, V I, Slepokon', Yu I, Lysenko, A A, Doil'nitsyn, V A
Format: Journal Article
Language:English
Published: New York Springer Nature B.V 01-11-2003
Subjects:
Alloys
Casting
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Summary:During exposing pearlitic steels to nitrate solutions, three mechanisms of iron transfer from the metal phase into solution are observed, depending on the solution pH and the presence of oxidants. The process yields either bivalent iron, colloid-disperse compounds of trivalent iron, or a lepidocrocite deposit. Oxide films thus formed have different protective value. A mechanism explaining the effect of different factors on the protective effectiveness of the oxide films is proposed.[PUBLICATION ABSTRACT]
ISSN:2070-2051
2070-206X
DOI:10.1023/B:PROM.0000007849.66243.f4