CORROSION OF GLASS SAMPLES BY MICROBIAL M ETABOLITES

The behaviour and the corrosive action of moulds was investigated on a lkali silicate glass samples. The glasses were contaminated with selec ted fungi in liquid phase. The structure and extent of surface layers was measured by X-ray diffraction analysis, X-ray fluorescence, light microscopy and scanning electron microscopy (SEM/EDX, microprobe analy sis). In the presence of moulds corrosion layers were formed at a 5 to 30 times bigger extent in comparison with the not contaminated sample s. They correspond to leached hydrated layers.