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Insight into silicate-glass corrosion mechanisms

Journal Article:

Abstract

The remarkable chemical durability of silicate glass makes it suitable for a wide range of applications. The slowdown of the aqueous glass corrosion kinetics that is frequently observed at long time is generally attributed to chemical affinity effects (saturation of the solution with respect to silica). Here, we demonstrate a new mechanism and highlight the impact of morphological transformations in the alteration layer on the leaching kinetics. A direct correlation between structure and reactivity is revealed by coupling the results of several structure-sensitive experiments with numerical simulations at mesoscopic scale. The sharp drop in the corrosion rate is shown to arise from densification of the outer layers of the alteration film, leading to pore closure. The presence of insoluble elements in the glass can inhibit the film restructuring responsible for this effect. This mechanism may be more broadly applicable to silicate minerals. (authors)
Authors:
Cailleteau, C; Angeli, F; Gin, S; Jollivet, P; [1]  Devreux, F; [2]  Jestin, J; [3]  Spalla, O [4] 
  1. CEA VALRHO, DEN, Lab Etude Comportement Long Terme, F-30207 Bagnols Sur Ceze, (France)
  2. Ecole Polytech, CNRS, Lab Phys Mat Condensee, F-91128 Palaiseau, (France)
  3. CEA, CNRS, Lab Leon Brillouin, F-91191 Gif Sur Yvette, (France)
  4. CEA, DSM, Lab Interdisciplinaire Org Nanometr et Supramol, F-91191 Gif Sur Yvette, (France)
Publication Date:
Jul 01, 2008
Product Type:
Journal Article
Resource Relation:
Journal Name: Nature Materials (Print); Journal Volume: 7; Journal Issue: 12; Other Information: 50 refs
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ADSORPTION; AQUEOUS SOLUTIONS; BOROSILICATE GLASS; CHEMICAL COMPOSITION; CHEMICAL PREPARATION; CHEMICAL REACTION KINETICS; DIFFUSION; HYDRATION; HYDROLYSIS; LEACHING; MONTE CARLO METHOD; MORPHOLOGY; POROSITY; RADIOACTIVE WASTE MANAGEMENT; SOLUBILITY; SPECIFIC SURFACE AREA; WATER
OSTI ID:
21224085
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1476-1122; TRN: FR09F0154090324
Availability:
Available from doi: <http://dx.doi.org/10.1038/nmat2301>;INIS
Submitting Site:
FRN
Size:
page(s) 978-983
Announcement Date:
Nov 25, 2009

Journal Article:

Citation Formats

Cailleteau, C, Angeli, F, Gin, S, Jollivet, P, Devreux, F, Jestin, J, and Spalla, O. Insight into silicate-glass corrosion mechanisms. France: N. p., 2008. Web. doi:10.1038/NMAT2301.
Cailleteau, C, Angeli, F, Gin, S, Jollivet, P, Devreux, F, Jestin, J, & Spalla, O. Insight into silicate-glass corrosion mechanisms. France. doi:10.1038/NMAT2301.
Cailleteau, C, Angeli, F, Gin, S, Jollivet, P, Devreux, F, Jestin, J, and Spalla, O. 2008. "Insight into silicate-glass corrosion mechanisms." France. doi:10.1038/NMAT2301. https://www.osti.gov/servlets/purl/10.1038/NMAT2301.
@misc{etde_21224085,
title = {Insight into silicate-glass corrosion mechanisms}
author = {Cailleteau, C, Angeli, F, Gin, S, Jollivet, P, Devreux, F, Jestin, J, and Spalla, O}
abstractNote = {The remarkable chemical durability of silicate glass makes it suitable for a wide range of applications. The slowdown of the aqueous glass corrosion kinetics that is frequently observed at long time is generally attributed to chemical affinity effects (saturation of the solution with respect to silica). Here, we demonstrate a new mechanism and highlight the impact of morphological transformations in the alteration layer on the leaching kinetics. A direct correlation between structure and reactivity is revealed by coupling the results of several structure-sensitive experiments with numerical simulations at mesoscopic scale. The sharp drop in the corrosion rate is shown to arise from densification of the outer layers of the alteration film, leading to pore closure. The presence of insoluble elements in the glass can inhibit the film restructuring responsible for this effect. This mechanism may be more broadly applicable to silicate minerals. (authors)}
doi = {10.1038/NMAT2301}
journal = {Nature Materials (Print)}
issue = {12}
volume = {7}
place = {France}
year = {2008}
month = {Jul}
}