The effect of acid gases on inorganic glasses leads to their dealkalization, reaction products occurred on the glass surface as a bloom. The changes in structure and composition of surface layer accompany the increase of glass chemical durability from 1 to 2 order of magnitude, rise of mechanical strength from 20 to 30 %, improvement of thermostability from 5 to 10 % [1-3]. The main disadvantage of gas treatment is the low depth of dealkalization layer (in case of industrial glasses - about 1 mm). Taking into account this fact, the dealkalized layer is rapidly destroyed and as a consequence there is a strong degradation [3]. Hence, the main direction of wide use of the method lies in the increasing the thickness of dealkalization layer. It is known that electric, magnetic and acoustic fields influence significantly the chemical processes [4]. The effect of physical fields on chemical interaction between gases and glass has not been described in literature. The aim of the presented work is to study the possibility of glass surfaces dealkalization intensification using electric field. The subjects of investigation were flat glass samples. As gas reagent SO2, CO2, CF2Cl2 and mixtures of these gases were used. Thermochemical treatment was carried out in the following way. Samples of glass were inserted into the kiln at room temperature. Then the samples were heated to the designed temperature and treated by gas reagent. After treatment samples were cooled in the kiln to the temperature below 100 0C. The samples of flat glass were presented as plates with the area from 50 to 100 cm2. Regimes of glass treatment are the following: temperature – between 300 and 600 0C, duration – between 5 min and 2 h, quantity of gas reagent feeded into the camera between 0.01 and 1.00 mol. Four experimental series have been conducted simultaneously: 1. Samples were heated in tube oven up to the given temperature, and then were treated by gas reagent. After the treatment glass was cooled in the oven turned off. 2. The glass samples were subjected to electric field in line with the previous part of thermal treatment but without active gases. 3. Simultaneous treatment by acid gases and electric field. 4. Repeat thermal treatment of glasses (as in part 1) but without gases and electric field. The intensity of glass dealkalization by gases was estimated using the extraction rate of alkaline cations. In experiments the influence of temperature, chemical composition of gas media, quantity of gas reagent feeded into the camera, duration of treatment and electric field on dealkalization rate of alkaline cations was studied. It has been established that with elevation of temperature, quantity of gas reagent feeded into the camera and duration of treatment of value dealkalization rate of alkaline cations of sheet glass grows up. The use of electric field results in the rise of dealkalization rate of silica glasses by active gases in several times. It was found in the experiments that dimension of electrodes as well as gap width influence on the extraction rate of alkaline cations. The mechanism of interaction of sheet glass with acid gases in the electric field is discussed.