Corrosivity of lead chloride containing salt mixtures

Hanna Kinnunen, Dorota Bankiewicz, Merja Hedman, Mikko Uusitalo, Sonja Enestam

    Research output: Chapter in Book/Conference proceedingConference contributionScientificpeer-review

    Abstract

    The presence and behaviour of heavy metal compounds in different parts of a circulating fluidized bed boiler burning recovered fuel have been previously determined with full-scale measurements and chemical modelling. Based on the results, lead was present as chlorides in different concentrations at all studied locations in the boiler. Boiler parts where lead chlorides are able to condense, have been identified. It is known that lead chloride increases corrosion risk when condensing on metal surfaces.In this work, the corrosivity of lead chloride with respect to material surface temperature was studied. The aim of this work was to identify a threshold temperature of lead chloride induced corrosion for practical applications. Another objective of this work was to determine whether the amount of lead chloride in the salt mixture has an effect on corrosivity. The laboratory scale corrosion tests were carried out in an isothermal tube oven in air. The salt mixtures of lead chloride with different amounts of potassium sulphate were used as synthetic deposits. Low alloy commercial boiler steels were used as test materials.
    Original languageUndefined/Unknown
    Title of host publicationProceedings of the 22nd International Conference on Fluidized Bed Conversion
    EditorsDorota Bankiewicz, Mia Mäkinen, Patrik Yrjas
    PublisherÅbo Akademi
    Pages660–666
    ISBN (Print)978-952-12-3223-7
    Publication statusPublished - 2015
    MoE publication typeA4 Article in a conference publication
    EventInternational Conference on Fluidized Bed Conversion - 22nd International Conference on Fluidized Bed Conversion (FBC)
    Duration: 14 Jun 201517 Jun 2015

    Conference

    ConferenceInternational Conference on Fluidized Bed Conversion
    Period14/06/1517/06/15

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