Sensitization and pitting corrosion resistance of ferritic stainless steel aged at 800°C

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dc.contributor.authorParoni A.S.M.
dc.contributor.authorAlonso-Falleiros N.
dc.contributor.authorMagnabosco R.
dc.date.accessioned2019-08-20T00:17:36Z
dc.date.available2019-08-20T00:17:36Z
dc.date.issued2006
dc.description.abstractThis work investigates the influence of sensitization conditions on pitting corrosion resistance of ferritic stainless steel UNS S43000 aged at 800°C between 10 min and 320 min. UNS S43000 steel is susceptible to intergranular corrosion after solution treatment at 1,160°C followed by water-quenching, as a consequence of the chromium depletion of the grain boundaries adjacent areas, due to chromium carbide precipitation during cooling. Isothermal treatments of 10 min at 800°C decrease the sensitization degree, and intergranular corrosion resistance is recovered after 20 min at 800°C. The solution-treated specimens have a high pitting potential in 3.5% sodium chloride (NaCl) solution compared to the same material treated at 800°C for 10 min. The resistance to pitting corrosion is reduced by chromium depletion associated with an increase of inter- and intragranular precipitation of chromium carbide. For treatments longer than 20 min at 800°C, the pitting corrosion resistance returns to the high level observed for the solution-treated condition, as a consequence of chromium redistribution that occurs after 20 min at 800°C. The scan rate used in potentiodynamic tests plays a minor role on the pitting potential, while a rougher surface leads to lower pitting potentials in all studied conditions. © 2006, NACE International.
dc.description.firstpage1039
dc.description.issuenumber11
dc.description.lastpage1046
dc.description.volume62
dc.identifier.citationParoni, A. S. M.; Alonso-Falleiros, N.; MAGNABOSCO, R.. Sensitization and Pitting Corrosion Resistance of Ferritic Stainless Steel Aged at 800°C. Corrosion (Houston, Tex.), v. 62, n. 11, p. 1039, 2006.
dc.identifier.doi10.5006/1.3278231
dc.identifier.issn0010-9312
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/2270
dc.relation.ispartofCorrosion
dc.rightsAcesso Restrito
dc.subject.otherlanguageFerritic stainless steel
dc.subject.otherlanguagePitting
dc.subject.otherlanguageSensitization
dc.subject.otherlanguageUNS S43000
dc.titleSensitization and pitting corrosion resistance of ferritic stainless steel aged at 800°C
dc.typeArtigo
fei.scopus.citations26
fei.scopus.eid2-s2.0-33845321970
fei.scopus.subjectFerritic stainless steel
fei.scopus.subjectPitting corrosion resistance
fei.scopus.subjectSensitization
fei.scopus.subjectWater quenching
fei.scopus.updated2024-12-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33845321970&origin=inward
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