Microbiologically Influenced Corrosion and Cracking of Steel

  • Nielsen, Lars Vendelbo (Project Participant)
  • Maahn, Ernst Emanuel (Project Manager)
  • Person, Unknown (Project Participant)
  • Person, Unknown (Project Participant)
  • Person, Unknown (Project Participant)

    Project Details


    - To provide and interpret experimental data that describe the combined effect of cathodic protection and microbiological activity (including sulfate reducing bacteria) on the hydrogen evolution reaction and hydrogen absorption by line pipe steel. -To asses on this basis, the risc of internal corrosion in pipelines used for transmission of crude oil,and of external corrosion and hydrogen induced cracking of pipelines used for transmission and destribution of oil and gas.
    - To develop an electrochemical probe that allows in-situ monitoring of soil-corrosivity in environments that include microbiological activity.
    Experimental programme.
    - Electrochemical investigation of the mechanisms of corrosion and hydrogen absorption by steel exposed to microbiologically active environments.
    - Mechanical testing of line pipe steel únder well defined conditions of hydrogen absorption by the steel, thereby describibg the susceptibility of the steel to hydrogen induced cracking in environments that include cathodic portection and microbiological activity.
    - Development of the electrochemical probe, establishment of criterions for interpretatio of the signals from the probe, and testing the probe in the field.
    - Results will be published in suitable national and international periodicals.
    - The data will porvide a basis for assesment of the optimum cathodic protection potential.
    - The data will provide a basis for design of a monitoring system for use in pipelines for croude oil transmission.
    - The electrochemical probe will be tested by HNG (Hovedstadsregionens naturgas)and DONG (Dansk Olie og Naturgas) for its applicability in in-situ monitoring of soil corrosivity and assessment of the risk of corrosion and cracking of burried pipelines in sediments that include microbiological activity.
    Effective start/end date01/01/199531/12/1997


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