Skip to Main content Skip to Navigation
Journal articles

Dissolution and Passivation of a Silicon-Rich Austenitic Stainless Steel during Active-Passive Cycles in Sulfuric and Nitric Acid

Abstract : The high Si containing X1CrNiSi18-15-4 stainless steel (SS) spontaneously forms a protective oxide film that is mostly composed of mixed chromium and silicon oxides. This film ensures a good durability of the industrial facilities the alloy was designed for, containing very acidic electrolytes such as hot and concentrated nitric acid, HNO$_3$ , in presence of oxidizing species. In the present work, the chemistry of the oxide formed and the passivation kinetics of the alloy in sulfuric acid, H$_2$SO$_4$, and for the first time in HNO$_3$ , were monitored by atomic emission spectroelectrochemistry (AESEC) over successive activation and passivation cycles of the material. X1CrNiSi18-15-4 SS was compared to a low Si containing SS, the X2CrNiN18-10 SS. It was found that a similar quantity and rate of passive film was formed during passivation, and dissolved during activation. Reproducible results were obtained over several active-passive cycles. The excess Cr was correlated with the dissolution rate decay during passivation. The Si/Cr ratio of the passive film was determined by X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy (performed using transmission electron microscopy), and AESEC giving similar results within experimental error. The EDX profile suggest that the passive film consists of a Si rich outer and Cr rich inner layer.
Document type :
Journal articles
Complete list of metadatas

Cited literature [54 references]  Display  Hide  Download

https://hal-cea.archives-ouvertes.fr/cea-02429964
Contributor : Bibliothèque Cadarache <>
Submitted on : Tuesday, January 7, 2020 - 8:27:36 AM
Last modification on : Thursday, September 17, 2020 - 12:30:34 PM

File

J. Electrochem. Soc.-2017-Laur...
Publisher files allowed on an open archive

Identifiers

Citation

Barbara Laurent, Nathalie Gruet, Benoît Gwinner, Frédéric Miserque, Karine Rousseau, et al.. Dissolution and Passivation of a Silicon-Rich Austenitic Stainless Steel during Active-Passive Cycles in Sulfuric and Nitric Acid. Journal of The Electrochemical Society, Electrochemical Society, 2017, 164 (13), pp.C892-C900. ⟨10.1149/2.1531713jes⟩. ⟨cea-02429964⟩

Share

Metrics

Record views

94

Files downloads

195