Anti-fouling and scratch resistant hybrid sol-gel coatings

Anne Pahkala, Juha Mannila, Marke Kallio, Juha Nikkola, Amar Mahiout, Jarmo Siivinen, Anne-Christine Ritschkoff, Riitta Mahlberg, Olli Posti, Mia Löija, Soili Takala

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    Abstract

    All surfaces are exposed to fouling, wearing and other degrading environmental effects during their lifetime.Continuous cleaning and repairing of surfaces causes financial losses and shutdowns in industrial processes.The aim of this study was to develop anti-fouling and scratch resistant hybrid sol-gel coatings for metal surfaces.Two different hybrid sol-gel coatings were prepared from modified solutions of silicon based alkoxides and coated on stainless steel by using spill and spray coating techniques.Anti-fouling properties were studied with contact angle measurements, fouling tests and FTIR scanning analysis.Abrasion properties were measured with pin-on-disk test and with an abrasive washing test (modified DIN 53778, Erichsen).Coatings were characterized with SEM and optical microscopy.According to performed anti-fouling tests, the cleanability of the anti-fouling sol-gel coated steel was enhanced compared to the uncoated steel surface.Measured water and oil contact angles were higher on the coated surface and the coated surface was not tainted.The abrasion tests showed that the scratch resistant coating abraded only slightly when the uncoated steel was abraded under the same load on a large scale.
    Original languageEnglish
    Title of host publicationApplied Material Research at VTT
    Subtitle of host publicationSymposium on Applied Materials
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages177-187
    ISBN (Electronic)951-38-6312-3
    ISBN (Print)951-38-6311-5
    Publication statusPublished - 2006
    MoE publication typeB3 Non-refereed article in conference proceedings
    EventInternal Symposium on Applied Materials - Espoo, Finland
    Duration: 8 Jun 20068 Jun 2006

    Publication series

    SeriesVTT Symposium
    Number244
    ISSN0357-9387

    Conference

    ConferenceInternal Symposium on Applied Materials
    CountryFinland
    CityEspoo
    Period8/06/068/06/06

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