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    Electrochemical Behavior of Nickel-Containing LAS in Deaerated TM0177 Solution A

    Access Status
    Fulltext not available
    Authors
    Kappes, M.
    Iannuzzi, Mariano
    Carranza, R.
    Blair, R.
    Rebak, R.
    Date
    2015
    Type
    Conference Paper
    
    Metadata
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    Source Title
    NACE - International Corrosion Conference Series
    Source Conference
    CORROSION 2015
    ISSN
    0361-4409
    Faculty
    Faculty of Science and Engineering
    School
    WASM: Minerals, Energy and Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/75300
    Collection
    • Curtin Research Publications
    Abstract

    Low alloy steels (LAS) are extensively used in oil and gas (O&G) production due to their good mechanical properties and low cost. NACE MR0175/ISO15156 specifies a maximum of 1wt% nickel (Ni) in LAS. That is, the NACE/ISO restriction excludes a significant number of high-strength and high-toughness alloys, such as Ni-Chromium (Cr)-Molybdenum (Mo), Ni-Mo and Ni-Cr-Mo-Vanadium (V) grades, for sour service applications. Ni is desirable in LAS because it: a) increases hardenability, strength, and fracture toughness, b) has a low penalty on weldability, and c) lowers the ductile to brittle transition temperature (DBTT) below -100°C. The aim of the current research was to melt eight experimental steels containing 0.2%C + 0.8% Mn and a varying concentration of Ni between 0 and 5%, and test their electrochemical response in deaerated NACE TM0177 solution A. Preliminary experimental results showed that Ni did not have a linear effect on the electrochemical behavior of the experimental steels at the corrosion potential and under cathodic polarization. In the anodic potential range, additions of 1% Ni or higher reduced the anodic dissolution current.

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