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Chemical durability of lead crystal glass: Comparison of short‐term aqueous and atmospheric alteration at 90°C
Author(s) -
Collin Marie,
Diallo Babacar,
Lecoq Hélène,
Ory Sandra,
Chauvet Elodie,
Pellerin Nadia
Publication year - 2021
Publication title -
international journal of applied glass science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 34
eISSN - 2041-1294
pISSN - 2041-1286
DOI - 10.1111/ijag.15843
Subject(s) - aqueous solution , leaching (pedology) , silanol , crystal (programming language) , corrosion , materials science , x ray photoelectron spectroscopy , alkali metal , crystallization , chemistry , inorganic chemistry , mineralogy , chemical engineering , metallurgy , catalysis , organic chemistry , geology , soil water , computer science , soil science , engineering , programming language
Abstract Crystal glass alteration in an aqueous medium has been extensively studied following the implementation of strict regulations regarding lead leaching. However, despite the widespread use of lead glasses and crystal glass by artists and artisans ever since antiquity, few works focus on crystal glass corrosion in atmospheric conditions. In this preliminary study, the altered layers formed on crystal glass in aqueous and atmospheric conditions at 90°C are compared. On the timescale studied (20 days), ToF‐SIMS profiles of both altered layers show water ingress. This hydration step is correlated with K leaching in aqueous media, and 29 Si and 27 Al NMR analysis of the altered structure highlights the formation of new Q 4 and AlO 6 units. Low alkali leaching is observed in atmospheric conditions, but the altered glass structure is highly hydrolyzed, as attested by its high water and silanol content. As a result, the altered layer formed in aqueous conditions is more polymerized than the one formed in atmospheric conditions, and potentially more passivating through a mechanism involving water availability. On the bases of 29 Si/ 1 H and 27 Al/ 1 H CP‐MAS NMR experiments, the oxygen repartition is described in the altered glasses, differentiating the oxygen atoms involved in structural NBO from that of hydroxyl groups.