Ceramics-Silikáty 51, (1) 57 - 66 (2007) |
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SURFACE DAMAGE OF TWO DIFFERENT WINEGLASSES DURING DISHWASHING PROCESS
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Petrušková Viera 1, Vrábel Peter 1, Šimurka Peter 1,
Šajgalík Pavol 2,
Maryška Martin 3
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1 RONA, j.s.c., 02 061 Lednické Rovne, Slovak Republic
2 Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 842 36 Bratislava, Slovak Republic
3 Department of Glass and Ceramics, Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague, Czech Republic
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Keywords: Barium crystal glass corrosion, Glass surface, Cross-section, Depth profile, Chemical durability,
Dishwashing process
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White cover (milky effect), iridescence and mechanical scratches on the glass surface are consequences of an automatic dishwashing
process. Controlled dishwashing conditions were used to study the iridescence and milky effect created on the glass
product. Glass surface, cutting cross-section and depth profile measurement of an unwashed and washed glass product at two
different glass types were investigated. Measured areas were analysed using optical microscopy, Scanning Electron
Microscopy (SEM), Electron Microprobe Analysis (EDX) and Electron Spectroscopy for Chemical Analysis (ESCA). A presence
of foreign components eventually their combinations were detected on the outer side of the washed damaged glass surface.
Small concentration changes were found on the inner side of washed glasses. Both glass surface and depth profile analyses
of corroded glass samples showed increasing concentration of Na, Ba, Ca and Al towards bulk glass. Barium crystal glass
containing aluminium was more corrosion resistant. |
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