Historic K-rich silicate glass surface alteration: behaviour of high-silica content matrices

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Abstract

Several K-Ca-Si glass compositions typical of Central-European glassworks are susceptible to damage beyond recall, even in mild museum conservative conditions. In order to provide a comprehensive picture of the deterioration process, replica samples were produced and exposed to four different museum-like environments. The corrosion experiment was followed by the use of ToF-SIMS, μ-Raman and μ-FTIR, performing a systematic compositional and structural study for the early stages (one year) of surface alteration. This work demonstrates the dominant role of Pb2+ and Ca2+ content for the inferable existence of connected conduction pathways, with strong implications on the surface's hydration, alkali-diffusion and hydrolysis.

Original languageEnglish
Pages (from-to)249-261
JournalCorrosion Science
Volume145
DOIs
Publication statusPublished - Dec 2018

Keywords

  • Cultural heritage
  • K-Ca-Si glass alteration
  • ToF-SIMS
  • μ-FTIR
  • μ-Raman

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