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    Low cost development of flowlines - Selection criteria of corrosion resistant alloys flowlines

    Access Status
    Fulltext not available
    Authors
    Anand, V.
    Salasi, Mobin
    Risbud, Mandar
    Gubner, Rolf
    Date
    2014
    Type
    Conference Paper
    
    Metadata
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    Citation
    Anand, V. and Salasi, M. and Risbud, M. and Gubner, R. 2014. Low cost development of flowlines - Selection criteria of corrosion resistant alloys flowlines, in Corrosion 2014: Collaborate, Educate, Innovate, Mitigate, Mar 9 2014. San Antonio, United States: National Association of Corrosion Engineers International.
    Source Title
    Corrosion Conference and Expo 2014: Collaborate. Educate. Innovate. Mitigate.
    Source Conference
    Corrosion 2014: Collaborate. Educate. Innovate. Mitigate
    ISSN
    03614409
    School
    School of Chemical and Petroleum Engineering
    URI
    http://hdl.handle.net/20.500.11937/47324
    Collection
    • Curtin Research Publications
    Abstract

    Corrosion resistant alloys (CRA) are often used for well-head equipment and the first length of flowlines, until the application of corrosion inhibited carbon steel becomes a viable choice. The objective of this research is to develop a cost effective and reliable material selection model based on experimental data with the help of Artificial Neural Network (ANN). Experiments were carried out in a jet impingement cell based on the Taguchi's orthogonal array (OA). Each steel specimen was subjected to specific conditions involving a pH range of 3-5, chloride concentrations between 1 wt% and 12 wt%, acetic acid range 50-600 ppm, temperatures in the range 100° C - 175° C and partial pressure of CO2 was 10bar. Pitting potentials (Epit) were extracted from cyclic polarization tests. The ANN was used to process the experimental results and to predict pitting potentials for various operational conditions. A good correlation between the experimental results and predicted data was found. Additional experiments were conducted to validate the predicted values. The developed ANN was used to simulate pitting potential of 316L as a function of pH, chloride concentration, acetic acid concentration, temperature and the resulting corrosion domain diagrams are presented.

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