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EFFECTS OF SMALL AMOUNT OF H2S ON CO2 CORROSION OFPIPELINE STEEL IN MULTIPHASE FLOW LOOP SYSTEM

机译:H2S的少量添加对多相流环管系统中CO2腐蚀的影响

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Experiments for the pipeline steel has been carried out in a multiphase flow loop systemat high temperature and high pressure. The study provides an example of the increasedcorrosion rate under multiphase flow condition due to the presence of small amounts ofH2S. Under these operating conditions, iron sulphide film interferes with the formation ofiron carbonate scale, which is less protective. The simultaneous presence of CO2 and H2Sin produced fluids can make a very aggressive environment, which may lead to severecorrosion for the mild steel. CO2 and H2S have been shown to produce competing films attemperature between 30 and 120 ℃ and it was observed that FeS is more protective thanFeCO3 at 90 ℃. The phases formed on the surface analyzed by SEM and XRD.
机译:管道钢的实验已在高温高压下在多相流回路系统中进行。该研究提供了一个例子,说明由于存在少量的H2S,在多相流条件下腐蚀速率增加的情况。在这些操作条件下,硫化铁膜会妨碍保护性较弱的碳酸铁垢的形成。同时产生CO2和H2Sin的流体会形成非常侵蚀性的环境,这可能导致低碳钢受到严重腐蚀。研究表明,在30到120℃之间,CO2和H2S会产生竞争膜,并且在90℃时,FeS比FeCO3更具保护性。通过SEM和XRD分析在表面上形成的相。

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  • 来源
    《Eurocorr 2004》|2004年|1-9|共9页
  • 会议地点 Nice(FR)
  • 作者

    G.S. DAS; A.S. KHANNA;

  • 作者单位

    Corrosion Science & EngineeringIndian Institute of Technology Bombay– 400076E-mail- gsdnifft@yahoo.com;

    Corrosion Science & EngineeringIndian Institute of Technology Bombay– 400076E-mail-gsdas@met.iitb.ac.in;

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