Selection of a mineral binder with potentialities for the stabilization/solidification of aluminum metal

C. Cau Dit Coumes 1 D. Lambertin 1 H. Lahalle 1 P. Antonucci 1 C. Cannes 2 S. Delpech 2
1 SPDE - Service des Procedés de Décontamination et d'Enrobage des Déchets
2 IPNO - Institut de Physique Nucléaire d'Orsay
Abstract : In a strongly alkaline medium, such as that encountered in conventional cementitious materials based on Portland cement, aluminum metal is corroded, with continued production of hydrogen. In order to develop a mineral matrix having enhanced compatibility with aluminum, a literature review was first undertaken to identify binders capable of reducing the pore solution pH compared with Portland cement. An experimental study was then carried out to measure the hydrogen production resulting from corrosion of aluminum metal rods encapsulated in the different selected cement pastes. The best results were achieved with magnesium phosphate cement, which released very little hydrogen over the duration of the study. This production could be reduced still further by adding a corrosion inhibitor (lithium nitrate) to the mixing solution. Open circuit potential measurement and Electrochemical Impedance Spectroscopy of aluminum electrode encapsulated in two pastes based on Portland cement and magnesium phosphate cement showed different redox behaviors. In the Portland cement paste, the electrochemical data confirmed the corrosion of aluminum whereas this latter tended to a passive state in the magnesium phosphate binder.
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Article dans une revue
Journal of Nuclear Materials, Elsevier, 2014, 453, pp.31-40. 〈10.1016/j.jnucmat.2014.06.032〉
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http://hal.in2p3.fr/in2p3-01072468
Contributeur : Sophie Heurteau <>
Soumis le : mercredi 8 octobre 2014 - 10:50:43
Dernière modification le : jeudi 11 janvier 2018 - 06:12:40

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C. Cau Dit Coumes, D. Lambertin, H. Lahalle, P. Antonucci, C. Cannes, et al.. Selection of a mineral binder with potentialities for the stabilization/solidification of aluminum metal. Journal of Nuclear Materials, Elsevier, 2014, 453, pp.31-40. 〈10.1016/j.jnucmat.2014.06.032〉. 〈in2p3-01072468〉

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