Corrosion Behaviour Of Bismuth-Silicate Glasses And Their Glass-Ceramic Derivatives And The Effect Of Ionizing Gamma-Irradiation

The corrosion weight losses by aqueous acidic or alkaline solutions have been studied for binary bismuth oxide-silica glasses and their corresponding glass-ceramic derivatives with the Bi2O3;SiO2 mol% varying from 90:10 to 50:50. The corrosive action on these glasses and glass-ceramics by acid solutions has been found to depend on the pH and the type of anion present in solution, and the attack by NaOH solution has been seen to be slightly lower than that by the acidic solutions. Generally, the corrosion decreases with the increase in the SiO2 content in the samples as expected due to the strong structural role of silica in the glass network. Also, the corrosion has been found to increase with the microcrystalline compact glass-ceramic derivatives.