The Effects Of Surface Area To Solution Volume Ratio And Surface Roughness On Glass Leaching

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. 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 with changes in surface roughness occurred with the two glasses, in which surface layer accumulation of insoluble components played a key role.