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    Modeling the Contribution of Gas Hydrate to Corrosion Rate Along the Subsea Pipelines

    213017_213017.pdf (543.9Kb)
    Access Status
    Open access
    Authors
    Obanijesu, Emmanuel
    Pareek, Vishnu
    Tade, Moses
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Obanijesu, E. and Pareek, V. and Tade, M. 2014. Modeling the Contribution of Gas Hydrate to Corrosion Rate Along the Subsea Pipelines. Petroleum Science and Technology. 32 (21): pp. 2538-2548.
    Source Title
    Petroleum Science and Technology
    DOI
    10.1080/10916466.2013.842586
    ISSN
    10916466
    School
    Department of Chemical Engineering
    Remarks

    This is an Author's Accepted Manuscript of an article published in Petroleum Science and Technology (2014), copyright Taylor & Francis, available online at: <a href="http://www.tandfonline.com/10.1080/10916466.2013.842586">http://www.tandfonline.com/10.1080/10916466.2013.842586</a>.

    URI
    http://hdl.handle.net/20.500.11937/22381
    Collection
    • Curtin Research Publications
    Abstract

    This study developed a corrosion predictive model along the deepwater gas pipelines with hydrate as the corroding agent. The model was developed and simulated with primary focus on the thermodynamic properties of each component of the gas mixture and a solution algorithm written with Matlab 6.5 (The MathWorks, Natick, MA) code. The model was validated by comparing the generated results with the outputs of already established laboratory and mathematical corrosion studies; the trends of the results obtained comparatively agreed with these studies to confirm its reliability. The model correctly predicted the relationships between corrosion rate and other thermodynamic parameters such as temperature, pressure, wall shear stress, velocity loss, and pH. This study showed that hydrates can initiate galvanic corrosion, stress cracking corrosion, and erosion-corrosion amongst others. Furthermore, the resulting corrosion rate from the hydrates could be as high as 174 mm/year (0.48 mm/day). This is extremely alarming compared to the industry’s aim to operate below 2 mm/year. At this rate, an underwater pipeline would be subjected to full bore rupture within some days if corrective measures are not quickly taken;hence, the need for further studies.

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