Electrochemical Changes During The Alteration Of Glasses: Continous Recording By Impedancemetry

Glass surfaces in contact with aqueous solutions are affected by alteration. The physicochemical mechanisms involved in this process have been studied for a long time. Nevertheless, in-situ monitoring of the evolution of the solid/solution interface during glass alteration is a difficult experimental problem. This paper presents the application of an electrochemical method (impedance spectroscopy) for continuous recording of glass alteration as near to the interface as possible. This technique allows local phenomena, such as local pH to be studied.