Magnesium alloys and graphite wastes encapsulated in cementitious materials: Reduction of galvanic corrosion using alkali hydroxide activated blast furnace slag.

Autor: Chartier D; Commissariat à l'Energie Atomique et aux Energies Alternatives, CEA, DEN, DTCD, SPDE, F-30207 Bagnols-sur-Cèze, France. Electronic address: david.chartier@cea.fr., Muzeau B; DEN-Service d'Etude du Comportement des Radionucléides (SECR), CEA, Université Paris-Saclay, F-91191, Gif-sur-Yvette, France., Stefan L; AREVA NC/D&S (France)/Technical Department, 1 place Jean Millier 92084 Paris La Défense, France., Sanchez-Canet J; Commissariat à l'Energie Atomique et aux Energies Alternatives, CEA, DEN, DTCD, SPDE, F-30207 Bagnols-sur-Cèze, France., Monguillon C; DEN-Service d'Etude du Comportement des Radionucléides (SECR), CEA, Université Paris-Saclay, F-91191, Gif-sur-Yvette, France.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2017 Mar 15; Vol. 326, pp. 197-210. Date of Electronic Publication: 2016 Dec 15.
DOI: 10.1016/j.jhazmat.2016.12.022
Abstrakt: Magnesium alloys and graphite from spent nuclear fuel have been stored together in La Hague plant. The packaging of these wastes is under consideration. These wastes could be mixed in a grout composed of industrially available cement (Portland, calcium aluminate…). Within the alkaline pore solution of these matrixes, magnesium alloys are imperfectly protected by a layer of Brucite resulting in a slow corrosion releasing hydrogen. As the production of this gas must be considered for the storage safety, and the quality of wasteform, it is important to select a cement matrix capable of lowering the corrosion kinetics. Many types of calcium based cements have been tested and most of them have caused strong hydrogen production when magnesium alloys and graphite are conditioned together because of galvanic corrosion. Exceptions are binders based on alkali hydroxide activated ground granulated blast furnace slag (BFS) which are presented in this article.
(Copyright © 2016 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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