open access publication

Article, 2024

Formation and evolution of secondary phases and surface altered layers during borosilicate glass corrosion in pore water

npj Materials Degradation, ISSN 2397-2106, Volume 8, 1, Page 26, 10.1038/s41529-024-00444-y

Contributors

Wang, Kaifeng 0000-0002-5076-8304 [1] [2] [3] Chen, Yang [4] Findling, Nathaniel [3] Charlot, Frédéric [5] Charlet, Laurent 0000-0003-3669-7316 [3] Liu, Jiliang 0000-0002-3491-3452 (Corresponding author) [6] Zhang, Zhentao (Corresponding author) [7]

Affiliations

  1. [1] Department of Geochemistry, Geological Survey of Denmark and Greenland, 1350, Copenhagen, Denmark
    2. [NORA names: GEUS Geological Survey of Denmark and Greenland; Governmental Institutions; Denmark; Europe, EU; Nordic; OECD];
  2. [2] Geological Survey of Denmark and Greenland
    3. [NORA names: GEUS Geological Survey of Denmark and Greenland; Governmental Institutions; Denmark; Europe, EU; Nordic; OECD];
  3. [3] Institut des Sciences de la Terre
    4. [NORA names: France; Europe, EU; OECD];
  4. [4] Zhengzhou Normal University
    5. [NORA names: China; Asia, East];
  5. [5] Grenoble Institute of Technology
    6. [NORA names: France; Europe, EU; OECD];

Abstract

The emergent secondary phases and surface altered layer (SAL) during the aqueous corrosion of borosilicate glass have a great impact on its chemical durability. However, the formation and evolution of these structures are still unclear. Here, by studying the borosilicate glass altered at 90 °C in pore water, the water in pore space between glass powders, the formation of secondary phases could follow two ways: 1. the consumption of aqueous ions forms analcime, zeolite, calcium silicate and barite at the surface of glass; 2. the reorganization of silica aggregates leads to smectite within the SAL. Small-angle X-ray scattering and cross-sectional scanning electron microscopy results show that the release of soluble elements and the formation of smectite within the SAL significantly increase the porosity of SAL. Furthermore, the layer containing smectite reorganizes inwardly and the crystallinity of smectite is gradually increased over time. The observations of transmission electron microscopy reveal that the dissolution of glass potentially goes through an interface-coupled dissolution-reprecipitation process.

Keywords

X-ray scattering, aggregation, alteration layer, analcime, aqueous corrosion, barite, borosilicate, borosilicate glass, calcium, calcium silicate, chemical, chemical durability, consumption, corrosion, crystallinity, dissolution, dissolution of glass, dissolution–reprecipitation process, durability, electron microscopy, electron microscopy results, elements, evolution, evolution of secondary phases, formation, formation of secondary phases, formation of smectite, glass, glass corrosion, glass powder, impact, interface-coupled dissolution–reprecipitation process, layer, microscopy, microscopy results, observation of transmission electron microscopy, observations, phase, pore, pore space, pore water, porosity, powder, process, release, reorganization, results, scanning electron microscopy results, scattering, secondary phases, silica aggregates, silicate, small-angle X-ray scattering, smectite, soluble elements, space, structure, surface, surface alteration layers, surface of glass, transmission electron microscopy, water, zeolite

Funders

  • European Synchrotron Radiation Facility
  • Ministry of Industry and Information Technology

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