Carbon steel corrosion under anaerobic–aerobic cycling conditions in near-neutral pH saline solutions – Part 1: Long term corrosion behaviour

AbstractThe application of carbon steel corrosion allowance containers for the long term encapsulation of HLW or spent fuel requires data on the likely rates of corrosion attack so that the metal thickness needed to prevent penetration can be estimated. This paper describes a joint mathematical modelling and experimental approach to the evaluation of the rate of localised corrosion.

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Long Term Corrosion Behaviour of Carbon Steel During Anaerobic to Aerobic Cycling Under Near-Neutral pH Saline Conditions

2010 8th International Pipeline Conference, Volume 1 ◽

10.1115/ipc2010-31164 ◽

2010 ◽

Cited By ~ 1

Author(s):

Brent W. A. Sherar ◽

Peter G. Keech ◽

Zack Qin ◽

Fraser King ◽

David W. Shoesmith ◽

...

Keyword(s):

Carbon Steel ◽

Focused Ion Beam ◽

Corrosion Behaviour ◽

Ion Beam ◽

Cycle Number ◽

Corrosion Rates ◽

Anaerobic Corrosion ◽

Film Porosity ◽

Electrochemical Microscopy

This paper investigates the long term corrosion behaviour of pretreated carbon steel under alternating anaerobic to aerobic cycles over 238 days. Changes in steel behaviour were observed electrochemically by monitoring the corrosion potential, and calculating changes to corrosion rate from linear polarization resistance. With increasing cycle number the corrosion process becomes localized at a small number of locations, consistent with the formation of tubercles. Periods of aerobic corrosion were associated with more positive potentials (between −500 mV to −350 mV) and high corrosion rates (70 to 120 μm yr−1); whereas anaerobic corrosion yielded more negative potentials (< −650 mV) and lower corrosion rates (40 to 50 μm yr−1). Upon termination of the experiment, corrosion product deposits were characterized by several techniques: scanning electrochemical microscopy to detect morphology; focused ion beam and cross sectioning to judge film thickness and film porosity; and Raman Spectroscopy to identify iron phases.

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Steel corrosion in reinforced alkali-activated materials

RILEM Technical Letters ◽

10.21809/rilemtechlett.2017.39 ◽

2017 ◽

Vol 2 ◽

pp. 33-39 ◽

Cited By ~ 16

Author(s):

Shishir Mundra ◽

Susan A. Bernal ◽

Maria Criado ◽

Petr Hlaváček ◽

Gino Ebell ◽

...

Keyword(s):

Corrosion Behaviour ◽

Steel Corrosion ◽

Threshold Value ◽

Steel Reinforcement ◽

Solution Chemistry ◽

Phase Assemblage ◽

Long Term Performance ◽

Term Performance ◽

Alkali Activated

The development of alkali-activated materials (AAMs) as an alternative to Portland cement (PC) has seen significant progress in the past decades. However, there still remains significant uncertainty regarding their long term performance when used in steel-reinforced structures. The durability of AAMs in such applications depends strongly on the corrosion behaviour of the embedded steel reinforcement, and the experimental data in the literature are limited and in some cases inconsistent. This letter elucidates the role of the chemistry of AAMs on the mechanisms governing passivation and chloride-induced corrosion of the steel reinforcement, to bring a better understanding of the durability of AAM structures exposed to chloride. The corrosion of the steel reinforcement in AAMs differs significantly from observations in PC; the onset of pitting (or the chloride ‘threshold’ value) depends strongly on the alkalinity, and the redox environment, of these binders. Classifications or standards used to assess the severity of steel corrosion in PC appear not to be directly applicable to AAMs due to important differences in pore solution chemistry and phase assemblage.

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A review of the archaeological analogue approaches to predict the long-term corrosion behaviour of carbon steel overpack and reinforced concrete structures in the French disposal systems

Journal of Nuclear Materials ◽

10.1016/j.jnucmat.2010.05.003 ◽

2010 ◽

Vol 402 (2-3) ◽

pp. 196-205 ◽

Cited By ~ 34

Author(s):

Delphine Neff ◽

Mandana Saheb ◽

Judith Monnier ◽

Stéphane Perrin ◽

Michael Descostes ◽

...

Keyword(s):

Reinforced Concrete ◽

Carbon Steel ◽

Corrosion Behaviour ◽

Concrete Structures ◽

Reinforced Concrete Structures

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Long-term corrosion behaviour of low-carbon steel in anoxic environment: Characterisation of archaeological artefacts

Journal of Nuclear Materials ◽

10.1016/j.jnucmat.2008.06.019 ◽

2008 ◽

Vol 379 (1-3) ◽

pp. 118-123 ◽

Cited By ~ 57

Author(s):

M. Saheb ◽

D. Neff ◽

Ph. Dillmann ◽

H. Matthiesen ◽

E. Foy

Keyword(s):

Carbon Steel ◽

Corrosion Behaviour ◽

Low Carbon Steel ◽

Low Carbon ◽

Anoxic Environment

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Development of Mathematical Models for Long-Term Prediction of Corrosion Behaviour of Carbon Steel Overpacks for Radioactive Waste Disposal

MRS Proceedings ◽

10.1557/proc-465-683 ◽

1996 ◽

Vol 465 ◽

Cited By ~ 6

Author(s):

A. R. Hoch ◽

A. Honda ◽

F. M. Porter ◽

S. M. Sharland ◽

N. Taniguchi

Keyword(s):

Carbon Steel ◽

Radioactive Waste ◽

Mathematical Models ◽

Waste Disposal ◽

Corrosion Behaviour ◽

Radioactive Waste Disposal ◽

Cathodic Reaction ◽

Term Prediction ◽

Long Term Prediction

ABSTRACTMathematical models to enable long-term prediction of the corrosion behaviour of carbon steel overpacks for radioactive waste have been developed. An existing model of the growth of pits, implemented in the CAMLE software, has been extended and used to investigate the sensitivity of the predictions to input parameters, including cathodic reaction kinetics and the relative position of the anode and cathode. Predictions have also been made of the aeration period of the repository, during which localised corrosion is possible.

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An Experimental Basis for a Mixed Potential Model for Nuclear Fuel Corrosion within a Failed Waste Container

MRS Proceedings ◽

10.1557/proc-824-cc2.3 ◽

2004 ◽

Vol 824 ◽

Cited By ~ 8

Author(s):

D.W. Shoesmith ◽

J.J. Noël ◽

F. Garisto

Keyword(s):

Carbon Steel ◽

Nuclear Fuel ◽

Input Data ◽

Potential Model ◽

Corrosion Behaviour ◽

Steel Corrosion ◽

Mixed Potential ◽

Experimental Basis ◽

Fuel Surface ◽

Waste Container

AbstractA mixed-potential model to predict the corrosion behaviour of nuclear fuel inside a failed carbon steel-lined copper waste container in a granitic repository is briefly described. A number of experiments underway to improve the mechanistic form of the model and to provide the necessary input data are discussed. A primary emphasis is placed on the consequences of the accumulation of corrosion product deposits on the fuel surface on the development of aggressive local chemistries, the cathodic reduction of H2O2 and potential for scavenging of H2O2 by the products of carbon steel corrosion (in particular H2).

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