Effect Of Surface Treatments On The Chemical Durability And Surface Composition Of Soda-Lime Glass Bottles

Chemical analyses show that water and 1% KHCO3 solutions extract material that resembles the bulk glass composition for both untreated and treated soda-lime bottles although much less material is extracted from treated bottles. Also, fluorine appears to be deeply dispersed at perhaps 1% concentration in a fluorocarbon-treated glass surface. Electron spectra obtained before and after ion milling detected no fluoride and indicated calcium and some sodium depletion for fluorocarbon-treated surfaces, and a depletion of calcium as well as sodium for sulfur-treated surfaces. There is also evidence from electron spectra of some sodium and calcium depletion in untreated glass surfaces.