The effects of surface roughness on the leaching characteristics of both a simple borosilicate and a soda-lime-silicate glass were evaluated by using five different surface preparations with a constant sample surface area to leachate volume ratio (SA/V). For the borosilicate glass, corrosion rates were accelerated as a result of surface roughness by much more than the percentage increase in surface area, but they were approximately equal to the surface area increases for the soda-lime-silicate glass. Opposite trends in the amount of selective leaching with changes in surface roughness occurred with the two glasses, in which surface layer accumulation of insoluble components played a key role. The effects of varying SA/V on leaching characteristics were evaluated for a simple borosilicate glass by using five different SA/V values for one surface preparation. Except for Si, increasing SA/V ratios resulted in both an increase in the leachate pH and a decrease in the total elemental removal. The net effect was a thinner depletion layer with larger SA/V ratios. These results are compared to those for simple silicate glasses found in the literature.
ASJC Scopus subject areas
- Ceramics and Composites
- Electronic, Optical and Magnetic Materials