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Efficacy of zinc salts to protect glass against atmospheric alteration. Part II: Possible passivation mechanisms
Author(s) -
Alloteau Fanny,
Majérus Odile,
Valbi Valentina,
Biron Isabelle,
Lehuédé Patrice,
Caurant Daniel,
Lefèvre Grégory,
Seyeux Antoine
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17589
Subject(s) - hydroxide , zinc , diffusion , passivation , humidity , chemistry , zinc hydroxide , relative humidity , ion , chemical engineering , inorganic chemistry , materials science , mineralogy , analytical chemistry (journal) , layer (electronics) , environmental chemistry , metallurgy , physics , organic chemistry , engineering , thermodynamics
To investigate the origin of the protection effect of zinc salts against glass atmospheric alteration, the speciation of Zn 2+ ions on glass according to the deposit protocol and the Zn 2+ surface concentration, and its change over time, was investigated in the light of the respective performances of the treatments. In that respect, a combination of various characterization methods of the glass surface and near‐surface was used before and after aging experiments (temperature, relative humidity (RH) control) of the Zn‐treated glass. Different Zn‐species could be observed on the surface of the treated glass: chemisorbed species, physisorbed species and precipitated hydroxide phases, their respective distribution being highly dependent on the nature of the treatment and on the Zn 2+ surface concentration. GI‐XAS (Zn K‐edge) and ToF‐SIMS experiments pointed out the conversion by thermal activation of these surface species into chemisorbed species inserted in the glass network in the near‐surface. The chemisorbed species appear to be the most effective ones for the glass protection, possibly by making the surface less soluble, less hydrophilic and even by acting as a diffusion barrier.