WATER CORROSION BEHAVIOR OF FLUOROALUMINATE GLASS

The water corrosion behavior of a typical fluoroaluminate glass was st udied in both plate and powder form. The infrared spectra of the corro ded plate sample exhibited an overall transmittance decrease but littl e absorption at 3450 cm(-1). Transmittance in the visible region was s ubstantially reduced with an increase of haziness. Microscopic observa tion revealed a uniform corrosion of the glass surface without any det ectable cracks. Dissolution of the glass powder in mater resulted in a slight pH increase of the solution. The leaching was congruent and th e dynamic dissolution process monitored by solution conductivity follo wed a logarithmic correlation with time. The corrosion behavior was gr eatly different from that of fluoride glasses in other systems.