Laboratory simulator for splash zone biofouling and corrosion in paper machine environment

Leena Carpen, Laura Raaska, Kirsi Kujanpää, Katri Mattila, Päivi Uutela, Mirja Salkinoja-Salonen, Tero Hakkarainen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    A novel laboratory simulator developed for pitting studies in chlorine dioxide bleaching was modified to investigate the effects of microbe containing environments in the splash zones of paper and board machines. Layers of dried chemical pulp were used to simulate deposits in splash zones. Artificial white water was prepared using as main components stone groundwood (sgw) and chemical pulp transferred from a paper machine. A consortium of aerobic as well as anaerobic bacteria typical for paper and board machine environments was used. Biofilm formation and the electrochemical behavior of stainless steel were studied. Open circuit potentials were recorded and polarization measurements were performed. The biofilms formed were analyzed by microbial cultivation and by epifluorescence microscopy. Sulfur compounds as well as the chloride and oxalate contents of the artificial white water in the course of the experiments were analyzed using capillary electrophoresis. Also some of the layers of chemical pulp closest to the metal surface were analyzed after the test. The results showed that the developed laboratory simulator was a valuable and versatile tool for studying the microbiological and chemical effects on pitting corrosion of stainless steel in conditions simulating the splash zone areas of paper and board machines.
    Original languageEnglish
    Title of host publication10th International Symposium on Corrosion in the Pulp and Paper Industry (10th ISCPPI). Helsinki, 21 - 24 August 2001
    Subtitle of host publicationVolume 2
    EditorsTero Hakkarainen
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages587-598
    ISBN (Print)951-38-5721-2
    Publication statusPublished - 2001
    MoE publication typeA4 Article in a conference publication
    Event10th International Symposium On corrosion in the Pulp and Paper Industry, ISCPPI - Helsinki, Finland
    Duration: 21 Aug 200124 Aug 2001

    Publication series

    SeriesVTT Symposium
    Number215

    Conference

    Conference10th International Symposium On corrosion in the Pulp and Paper Industry, ISCPPI
    Abbreviated title10th ISCPPI
    CountryFinland
    CityHelsinki
    Period21/08/0124/08/01

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  • Cite this

    Carpen, L., Raaska, L., Kujanpää, K., Mattila, K., Uutela, P., Salkinoja-Salonen, M., & Hakkarainen, T. (2001). Laboratory simulator for splash zone biofouling and corrosion in paper machine environment. In T. Hakkarainen (Ed.), 10th International Symposium on Corrosion in the Pulp and Paper Industry (10th ISCPPI). Helsinki, 21 - 24 August 2001: Volume 2 (pp. 587-598). VTT Technical Research Centre of Finland. VTT Symposium, No. 215