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Glass structure and electrochemical selectivity

Ion selective electrodes, potentiometry, and potentiometric titrations.

Because most silicate glasses have a high resistance to corrosion in normal environments, glass per se is frequently considered to be an inert substance. Such is not the case, as can be attested to by certain optical glasses that are readily stained in the atmosphere (e.g., dense flints and barium crowns) or etched by mild acid action, the effects being readily observed with the naked eye. Most glasses, including the “chemically resistant” glasses, will experience localized chemical attack and form a surface composition that may be substantially different from that of the bulk glass. Surface phenomena, such as the adsorption of gases, reaction with biological species, and reflection of light, may be critically influenced by such corrosion of glass surfaces, even though it is on a minute scale. Any discussion of the corrosion of glass thus has to reach two audiences of widely different interests, the engineer, who is usually most interested in the gross effect and its influence on mechanical properties, and the chemist, who is concerned at the molecular level with the chemical or catalytic changes that occur or are induced as a result of such corrosion.

Glass structure and electrochemical selectivity

Citations

Ion selective electrodes, potentiometry, and potentiometric titrations.

Surface Chemistry and Corrosion of Glass

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