Universität zu Köln

Lenting, Christoph ORCID: 0000-0001-8374-5857 and Geisler, Thorsten (2021). Corrosion of ternary borosilicate glass in acidic solution studied in operando by fluid-cell Raman spectroscopy. NPJ Mater. Degrad., 5 (1). LONDON: SPRINGERNATURE. ISSN 2397-2106

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Abstract

Fluid-cell Raman spectroscopy is a space and time-resolving application allowing in operando studies of dynamic processes during solution-solid interactions. A currently heavily debated example is the corrosion mechanism of borosilicate glasses, which are the favoured material for the immobilization of high-level nuclear waste. With an upgraded fluid-cell lid design made entirely from the glass sample itself, we present the polymerization of the surface alteration layer over time in an initially acidic environment, including the differentiation between pore and surface-adsorbed water within it. Our results support an interface-coupled dissolution-precipitation model, which opposes traditional ion-exchange models for the corrosion mechanism. A sound description of the corrosion mechanism is essential for reliable numerical models to predict the corrosion rate of nuclear waste glasses during long-term storage in a geological repository.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Lenting, Christoph UNSPECIFIED orcid.org/0000-0001-8374-5857 UNSPECIFIED Geisler, Thorsten UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-572788
DOI:	10.1038/s41529-021-00182-5
Journal or Publication Title:	NPJ Mater. Degrad.
Volume:	5
Number:	1
Date:	2021
Publisher:	SPRINGERNATURE
Place of Publication:	LONDON
ISSN:	2397-2106
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language INTERFACIAL DISSOLUTION-REPRECIPITATION; ATOMIC-FORCE MICROSCOPY; ALTERATION KINETICS; DEPTH RESOLUTION; SILICATE-GLASSES; SON68; MECHANISMS; RESUMPTION; TERM; INTERFEROMETRY Multiple languages Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/57278