Corrosion Mechanism of Austenitic Stainless Steel in Simulated Small Modular Reactor Primary Water Chemistry

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creativework.keywordselectrochemical impedance spectroscopy, general corrosion, primary coolant chemistry, small modular reactor, stainless steel
creativework.publisherMultidisciplinary Digital Publishing Institute (MDPI)en
dc.contributor.authorBetova I.
dc.contributor.authorBojinov M.
dc.contributor.authorKarastoyanov V.
dc.date.accessioned2026-01-20T13:58:04Z
dc.date.accessioned2026-01-20T15:55:08Z
dc.date.available2026-01-20T13:58:04Z
dc.date.available2026-01-20T15:55:08Z
dc.date.issued2025-08-01
dc.description.abstractIn the present paper, impedance spectroscopy was employed to study the corrosion and anodic oxidation of stainless steel (AISI 316L at 280 °C/9 MPa) in contact with the boron-free primary coolant of a small modular reactor at two levels of KOH concentration. Analysis of impedance spectra with a distribution of relaxation times revealed contributions from the oxide layer and its interface with the coolant. Glow-Discharge Optical Emission Spectroscopy (GDOES) was used to estimate the thickness and elemental composition of the formed oxides. A quantitative interpretation of the impedance data using the Mixed-Conduction Model allowed us to estimate the kinetic and transport parameters of oxide growth and dissolution, as well as iron dissolution through oxide. The film thicknesses following exposure agreed with ex-situ analyses. The obtained corrosion and release rates were used for comparison with laboratory and industrial data in nominal pressurized water reactor primary coolants.
dc.identifier.doi10.3390/met15080875
dc.identifier.issn2075-4701
dc.identifier.scopusSCOPUS_ID:105014262693en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/1882
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105014262693&origin=inward
dc.titleCorrosion Mechanism of Austenitic Stainless Steel in Simulated Small Modular Reactor Primary Water Chemistry
dc.typeArticle
oaire.citation.issue8
oaire.citation.volume15
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