| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Poras, Gabriel
CEA Marcoule
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Highlighting aluminium-magnesium alloys passivation in magnesium potassium phosphate cement: a step forward towards the conditioning of such metallic waste
- 2023Magnesium potassium phosphate cement: a promising binder for the conditioning of aluminum-magnesium alloys waste
- 2023Magnesium potassium phosphate cement: a promising binder for the conditioning of aluminum-magnesium alloys waste
- 2023Potential of magnesium potassium phosphate cements for the stabilization / solidification of low- or intermediate-level radioactive waste
- 2023Electrochemical Behavior of Al/Mg Alloys Immobilized in a Magnesium Potassium Phosphate Cement-Based Mortarcitations
- 2022Anomalous high strain rate compressive behavior of additively manufactured copper micropillarscitations
- 2022Recent advances in the immobilization of low- or intermediate-level radioactive waste in cementitious materials: potential of magnesium potassium phosphate cements
- 2022Electrochemical impedance spectroscopy: a non-destructive method to study the corrosion of aluminum-magnesium alloys in a magnesium phosphate cement-based matrix
- 2022Contribution of electrochemical impedance spectroscopy to the study of aluminium-magnesium alloys corrosion in magnesium potassium phosphate cement pore solution
- 2021Study of the conditioning of aluminum-magnesium alloys in magnesium potassium phosphate cement
Places of action
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document
Magnesium potassium phosphate cement: a promising binder for the conditioning of aluminum-magnesium alloys waste
Abstract
The reprocessing of spent fuel designed for natural uranium – graphite – gas reactors has produced some waste with aluminum alloys, which need to be stabilized and solidified before their final disposal. Portland cement is extensively used for the conditioning of low-level and intermediate-level radioactive waste; however, its high alkalinity is a serious obstacle to aluminum stabilization, as it is oxidized by the mixing solution, with production of dihydrogen. This work investigates a new solution consisting in using magnesium potassium phosphate cement (MKPC) instead of Portland cement (PC). Gas chromatography and electrochemical impedance spectroscopy (EIS) are used to monitor the corrosion of pure aluminum and aluminum-magnesium alloys containing 2 to 4.5 wt.% of Mg in MKPC mortar. EIS provides qualitative information about the corrosion, but also makes it possible to assess the corrosion current using an equivalent electrical circuit linked to the kinetic parameters of the postulated corrosion mechanism. It is shown that the corrosion current of the alloys, regardless of their composition, is reduced by about two orders of magnitude in MKPC mortar as compared to Portland cement mortar. This result opens up new prospects for increasing the incorporation rate of reactive Al metal in a cementitious matrix.