The effect of nitrate on salt layers in pitting corrosion of 304L stainless steel

Research output: Contribution to journalArticlepeer-review

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The effect of nitrate on salt layers in pitting corrosion of 304L stainless steel. / Street, Steven R.; Xu, Weichen; Amri, Mahrez; Guo, Liya; Glanvill, Sarah J M; Quinn, Paul D.; Mosselmans, J. Frederick W; Vila-Comamal, Joan; Rau, Christoph; Rayment, Trevor; Davenport, Alison J.

In: Journal of the Electrochemical Society, Vol. 162, No. 9, 23.06.2015, p. C457-C464.

Research output: Contribution to journalArticlepeer-review

Harvard

Street, SR, Xu, W, Amri, M, Guo, L, Glanvill, SJM, Quinn, PD, Mosselmans, JFW, Vila-Comamal, J, Rau, C, Rayment, T & Davenport, AJ 2015, 'The effect of nitrate on salt layers in pitting corrosion of 304L stainless steel', Journal of the Electrochemical Society, vol. 162, no. 9, pp. C457-C464. https://doi.org/10.1149/2.0421509jes

APA

Street, S. R., Xu, W., Amri, M., Guo, L., Glanvill, S. J. M., Quinn, P. D., Mosselmans, J. F. W., Vila-Comamal, J., Rau, C., Rayment, T., & Davenport, A. J. (2015). The effect of nitrate on salt layers in pitting corrosion of 304L stainless steel. Journal of the Electrochemical Society, 162(9), C457-C464. https://doi.org/10.1149/2.0421509jes

Vancouver

Author

Street, Steven R. ; Xu, Weichen ; Amri, Mahrez ; Guo, Liya ; Glanvill, Sarah J M ; Quinn, Paul D. ; Mosselmans, J. Frederick W ; Vila-Comamal, Joan ; Rau, Christoph ; Rayment, Trevor ; Davenport, Alison J. / The effect of nitrate on salt layers in pitting corrosion of 304L stainless steel. In: Journal of the Electrochemical Society. 2015 ; Vol. 162, No. 9. pp. C457-C464.

Bibtex

@article{b47772a05b8b4ee895db7ae33127d56e,
title = "The effect of nitrate on salt layers in pitting corrosion of 304L stainless steel",
abstract = "Current oscillations were observed during one-dimensional pitting corrosion of 304 L stainless steel in neutral 1 M NaCl solutions with varying NaNO3 concentrations. Synchrotron X-ray diffraction was used to identify the salt layer at the corrosion front. It was found that, although current oscillations were induced in solutions with higher concentrations of NaNO3, the salt species in the pit did not change and a nitrate-free salt was present in all solutions. At higher NaNO3 concentrations, a change of salt crystal morphology was detected. Electrochemical oscillations were seen to coincide with secondary pitting on the pit surface indicating that two corrosion regimes were operating in parallel. Synchrotron radiography was used on artificial pits to measure the change in corrosion front and material loss in situ. Before nitrate was added, the corrosion front showed non-uniform material loss across the interface when beneath the salt layer. Nitrate addition induced a local region of passivation that propagated across the pit surface. Surface roughness was quantified using R-values and seen to vary without a clear trend until passivation, after which it stayed constant. A mechanism is suggested in which partial passivation occurs in these systems, where passivated areas are undercut as the corrosion front moves, generating surges in current.",
author = "Street, {Steven R.} and Weichen Xu and Mahrez Amri and Liya Guo and Glanvill, {Sarah J M} and Quinn, {Paul D.} and Mosselmans, {J. Frederick W} and Joan Vila-Comamal and Christoph Rau and Trevor Rayment and Davenport, {Alison J.}",
year = "2015",
month = jun,
day = "23",
doi = "10.1149/2.0421509jes",
language = "English",
volume = "162",
pages = "C457--C464",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society",
number = "9",

}

RIS

TY - JOUR

T1 - The effect of nitrate on salt layers in pitting corrosion of 304L stainless steel

AU - Street, Steven R.

AU - Xu, Weichen

AU - Amri, Mahrez

AU - Guo, Liya

AU - Glanvill, Sarah J M

AU - Quinn, Paul D.

AU - Mosselmans, J. Frederick W

AU - Vila-Comamal, Joan

AU - Rau, Christoph

AU - Rayment, Trevor

AU - Davenport, Alison J.

PY - 2015/6/23

Y1 - 2015/6/23

N2 - Current oscillations were observed during one-dimensional pitting corrosion of 304 L stainless steel in neutral 1 M NaCl solutions with varying NaNO3 concentrations. Synchrotron X-ray diffraction was used to identify the salt layer at the corrosion front. It was found that, although current oscillations were induced in solutions with higher concentrations of NaNO3, the salt species in the pit did not change and a nitrate-free salt was present in all solutions. At higher NaNO3 concentrations, a change of salt crystal morphology was detected. Electrochemical oscillations were seen to coincide with secondary pitting on the pit surface indicating that two corrosion regimes were operating in parallel. Synchrotron radiography was used on artificial pits to measure the change in corrosion front and material loss in situ. Before nitrate was added, the corrosion front showed non-uniform material loss across the interface when beneath the salt layer. Nitrate addition induced a local region of passivation that propagated across the pit surface. Surface roughness was quantified using R-values and seen to vary without a clear trend until passivation, after which it stayed constant. A mechanism is suggested in which partial passivation occurs in these systems, where passivated areas are undercut as the corrosion front moves, generating surges in current.

AB - Current oscillations were observed during one-dimensional pitting corrosion of 304 L stainless steel in neutral 1 M NaCl solutions with varying NaNO3 concentrations. Synchrotron X-ray diffraction was used to identify the salt layer at the corrosion front. It was found that, although current oscillations were induced in solutions with higher concentrations of NaNO3, the salt species in the pit did not change and a nitrate-free salt was present in all solutions. At higher NaNO3 concentrations, a change of salt crystal morphology was detected. Electrochemical oscillations were seen to coincide with secondary pitting on the pit surface indicating that two corrosion regimes were operating in parallel. Synchrotron radiography was used on artificial pits to measure the change in corrosion front and material loss in situ. Before nitrate was added, the corrosion front showed non-uniform material loss across the interface when beneath the salt layer. Nitrate addition induced a local region of passivation that propagated across the pit surface. Surface roughness was quantified using R-values and seen to vary without a clear trend until passivation, after which it stayed constant. A mechanism is suggested in which partial passivation occurs in these systems, where passivated areas are undercut as the corrosion front moves, generating surges in current.

UR - http://www.scopus.com/inward/record.url?scp=84937039847&partnerID=8YFLogxK

U2 - 10.1149/2.0421509jes

DO - 10.1149/2.0421509jes

M3 - Article

AN - SCOPUS:84937039847

VL - 162

SP - C457-C464

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 9

ER -