ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 51, (4) 235 - 241 (2007)


THE INVESTIGATION OF THE LINE CORROSION OF HOUSEHOLD GLASS IN WATER SOLUTIONS
 
Mikoczyová Monika 1, Petrušková Viera 2, Vrábel Peter 2
 
1 Vitrum Laugaricio, Joint Glass Center of the Institute of Inorganic Chemistry, Slovak Academy of Sciences, Alexander Dubček University of Trenčín, Študentská 2, 911 50 Trenčín, Slovak Republic
2 Faculty of Industrial Technologies in Púchov, Alexander Dubček University of Trenčín, I. Krasku 491/30, 020 32 Púchov, Slovak Republic

Keywords: Line corrosion, Glass homogeneity
 

Glass is generally considered to be a chemically durable material; nevertheless it is attacked by various corrosive solutions (corrosion process). A special case is so called line corrosion, which is caused by dissolution of surface layers of household glass during automatic washing. The goal of this work was to standardize visual method of homogeneity measurement by Shelyubskii method and to analyze the mechanism of creation of the line corrosion. Both goals consider the influence of temperature of glass melt in melting process on line corrosion. An attempt was made to identify relation between the homogeneity of glass and the extent of line corrosion as the means of estimation of the susceptibility of glass to line corrosion without necessity perform time consuming washing tests. Damaged samples coming from the dishwashing process were analyzed by optical microscopy, scanning electron microscopy and electron dispersive X-ray analysis after the visual control. Line corrosion origin was identified in the forehearth channel as a consequence of dissolution of AZS refractory. The most important parameter influencing the extent of the line corrosion is the temperature of glass melt in the melting tank.


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