Chemical resistance and cleanability of glazed surfaces

Leena Hupa, R Bergman, L Froberg, S Vane-Tempest, Mikko Hupa, T Kronberg, E Pesonen-Leinonen, AM Sjoberg

    Tutkimustuotos: LehtiartikkeliArtikkeliTieteellinenvertaisarvioitu

    48 Sitaatiot (Scopus)

    Abstrakti

    Adhesion of soil on glazed surfaces and their cleanability depends on chemical composition, phase composition, and roughness of the surface. The surface can be glossy consisting mainly of a smooth glassy phase. A matt and rough surface consists of a glassy phase and one or more crystalline phases. The origin and composition of the crystalline phases affect the chemical resistance and the cleanability of the surface. Fifteen experimental glossy and matt glazes were soaked in a slightly alkaline cleaning agent solution. The surfaces were spin-coated with sebum, i.e. a soil component typical for sanitary facilities. After wiping out the soil film in a controlled manner, the surface conditions and the soil left were evaluated with colour measurements, SEM/EDXA and COM. The results show that wollastonite-type crystals in the glaze surfaces were attacked in aqueous solutions containing typical cleaning agents. This corrosion led to significant decrease in the cleanability of the surface. The other crystal types observed, i.e. diopside and quartz crystals were not corroded, and the cleanability of glazes containing only these crystals was not changed in the cleaning agent exposures. Also the glassy phase was found to be attacked in some formulations leading to a somewhat decreased cleanability. The repeated soiling and cleaning procedures indicated that soil is accumulated on rough surfaces and surfaces which were clearly corroded by the cleaning agent.
    AlkuperäiskieliEi tiedossa
    Sivut113–118
    Sivumäärä6
    JulkaisuSurface Science
    Vuosikerta584
    Numero1
    DOI - pysyväislinkit
    TilaJulkaistu - 2005
    OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

    Keywords

    • ceramics
    • corrosion
    • crystalline-glass interfaces
    • grain boundaries
    • polycrystalline surfaces
    • scanning electron microscopy (SEM)
    • surface roughening

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