Abstract
Static experiments have been developped to investigate the R7T7 glass corrosion in four natural salt brines (brines 1 and 3: pure halite, brines 2 and 4: high Mg, K fluid inclusions rich halite), at 90°C and 150°C with 0.7 cm −1 S/V ratio and at 11 different running times. Analysis of brines after alteration (pHmeter and ICP) added to a detailed study of the crystalline phases developped at the interface glass-brine (XRD, SEM and Microprobe), showed that the influence of the compositional difference is more important on the nature of the secondary phases formed than on the corrosion rate of the glass. After 91 days of alteration at 150°C stady states seems to be reached (after 40 days at 90°C).
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