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    Adsorption of corrosion inhibitor 1-dodecylpyridinium chloride on carbon steel studied by in situ AFM and electrochemical methods

    Access Status
    Fulltext not available
    Authors
    Pandarinathan, Vedapriya
    Lepkova, Katerina
    Bailey, Stuart
    Becker, Thomas
    Gubner, Rolf
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Pandarinathan, Vedapriya and Lepkova, Katerina and Bailey, Stuart I. and Becker, Thomas and Gubner, Rolf. 2014. Adsorption of corrosion inhibitor 1-dodecylpyridinium chloride on carbon steel studied by in situ AFM and electrochemical methods. Industrial and Engineering Chemistry Research. 53 (14): pp. 5858-5865.
    Source Title
    Industrial and Engineering Chemistry Research
    DOI
    10.1021/ie402784y
    ISSN
    0888-5885
    URI
    http://hdl.handle.net/20.500.11937/45799
    Collection
    • Curtin Research Publications
    Abstract

    Corrosion rates are influenced by the formation of inhibitor aggregates at the steel surface. In situ atomic force microscopy (AFM) was used to investigate the adsorbed structures of cationic surfactant 1-dodecylpyridinium chloride (DPC) at a carbon steel surface in relation to its performance as a CO2-corrosion inhibitor. An increase in the water contact-angle in the presence of DPC indicated its adsorption at the steel, and in situ AFM visualization confirmed the formation of DPC aggregates. The aggregates changed from hemispherical to cylindrical shape with increasing DPC concentration in CO2-saturated brine, resulting in a decrease in corrosion rates as determined by electrochemical measurements. For comparison to the aggressive CO2 environment, the inhibition behavior of DPC was monitored in less corrosive N2-saturated solutions. Formation of cylindrical aggregates was quicker, and a lower corrosion rate was observed in brine saturated with N2 compared to CO2.

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