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    Understanding barium sulfate precipitation onto stainless steel

    20624_downloaded_stream_80.pdf (122.1Kb)
    Access Status
    Open access
    Authors
    Jones, Franca
    Jones, P.
    De Marco, Roland
    Pejcic, Bobby
    Rohl, Andrew
    Date
    2008
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Jones, Franca and Jones, Phillip and De Marco, Roland and Pejcic, Bobby and Rohl, Andrew. 2008. Understanding barium sulfate precipitation onto stainless steel. Applied Surface Science 254 (11): 3459-3468.
    Source Title
    Applied Surface Science
    DOI
    10.1016/j.apsusc.2007.11.062
    Faculty
    Department of Applied Chemistry
    Division of Engineering, Science and Computing
    Faculty of Science
    Remarks

    The link to this article is:

    http://dx.doi.org/10.1016/j.apsusc.2007.11.062

    Copyright 2008 Elsevier B.V. All rights reserved

    URI
    http://hdl.handle.net/20.500.11937/38092
    Collection
    • Curtin Research Publications
    Abstract

    This paper investigates the influence of barium sulfate scaling and scaling inhibitors on the electrochemical behaviour of stainless steel. The results of a synchrotron radiation grazing incidence X-ray diffraction (SR-GIXRD) and electrochemical impedance spectroscopy (EIS) study on stainless steel shows that different scaling inhibitors interact uniquely with the substrate when barium sulfate is precipitated on the electrode surface. The main effect of the substrate in the presence of inhibitor is a tendency to form smaller barium sulfate particles. The SR-GIXRD patterns obtained in the presence of the two inhibitors were different to each other and to the control, with the carboxylate showing greater amounts of barite solids precipitated together with iron(III) and (II) sulfate, while the phosphonate showed low amounts of barite solid were precipitated. The presence of iron sulfates on the electrode surface as detected by SR-GIXRD, in the case of NTA, suggests that scaling inhibitors are not alwaysbenign, and can promote the dissolution of iron species from the substrate.

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