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Corrosion of Lead Glasses in Acid Media: II, Concentration Profile Measurements
Author(s) -
WOOD SUSAN,
BLACHEFE J. R.
Publication year - 1978
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/j.1151-2916.1978.tb09311.x
Subject(s) - corrosion , activation energy , diffusion , leaching (pedology) , analytical chemistry (journal) , materials science , silicate glass , lead (geology) , dissolution , lead glass , mineralogy , silicate , thermal diffusivity , surface layer , chemistry , metallurgy , layer (electronics) , thermodynamics , composite material , environmental chemistry , geology , physics , organic chemistry , geomorphology , soil water , soil science
Lead concentration profiles were measured in a binary lead silicate glass corroded by acid using ahd a‐backscattering technique. These profiles were characteristic of those predicted for an interdiffusion process and revealed a surface layer deficient in lead. Diffusion coefficients for Pb 2+ were calculated, together with values of the total amount of lead removed at the various experimental temperatures and times. Good agreement was found between these data and those previously obtained experimentally. All diffusion coefficient values were high and, correspondingly, activation energy values were low compared with those predicted by the literature for similar glass compositions. This difference was justified from consideration of the leaching process.