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Interactions of Silicate Glasses with Aqueous Environments Under Conditions of Prolonged Contact and Flow

Published online by Cambridge University Press:  21 February 2011

A A. Barkatt ,
E. E. Saad ,
R. B. Adiga ,
W. Sousanpour ,
A L. Barkatt ,
X. Feng ,
J. A. O'keefe  and
S. Alterescu
A A. Barkatt
Affiliation:
Department of Chemistry, The Catholic University of America, Washington, DC 20064 Vitreous State Laboratory, The Catholic University of America, Washington, DC 20064
E. E. Saad
Affiliation:
Vitreous State Laboratory, The Catholic University of America, Washington, DC 20064
R. B. Adiga
Affiliation:
Vitreous State Laboratory, The Catholic University of America, Washington, DC 20064
W. Sousanpour
Affiliation:
Vitreous State Laboratory, The Catholic University of America, Washington, DC 20064
A L. Barkatt
Affiliation:
Vitreous State Laboratory, The Catholic University of America, Washington, DC 20064
X. Feng
Affiliation:
Department of Chemistry, The Catholic University of America, Washington, DC 20064 Vitreous State Laboratory, The Catholic University of America, Washington, DC 20064
J. A. O'keefe
Affiliation:
NASA Goddard Space Flight Center, Greenbelt, MD
S. Alterescu
Affiliation:
NASA Goddard Space Flight Center, Greenbelt, MD
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Abstract

Studies of the corrosion process of silicate and boro-silicate glasses under a broad range of contact times, surface-to-volume ratios and leachant compositions indicate that dissolution of such glasses in aqueous media can be interpreted in terms of activity of dissolving amorphous silica. This activity is modified by the presence of elements such as Al, Mg and Fe. The effects of these elements, when initially present in the glass or in the leachant, and, in general, the effects of glass composition on the course of the corrosion process can be viewed in terms of the formation of a surface layer on the leached glass. The type, composition and structure of this layer, which are determined by glass composition, control the dissolution behavior of the glass.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 125: Symposium N – Materials Stability and Environmental Degradation , 1988 , 129
Copyright
Copyright © Materials Research Society 1988

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References

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