Monitoring Techniques for Microbially Influenced Corrosion of Carbon Steel

Lisbeth Rischel Hilbert

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch


    Microbially influenced corrosion (MIC) of carbon steel may occur in media with microbiological activity of especially sulphate-reducing bacteria, e.g. on pipelines buried in soil and on marine structures. MIC of carbon steel must be monitored on-line in order to provide an efficient protection and control the corrosion. A number of monitoring techniques is industrially used today, and the applicability and reliability of these for monitoring MIC is evaluated. Coupons and ER are recommended as necessary basic techniques even though localised corrosion rate cannot be measured. FSM measures general corrosion and detects localised corrosion, but the sensitivity is not high enough for monitoring initiation of pitting and small attacks. Electrochemical techniques as LPR and EIS give distorted data and unreliable corrosion rates, when biofilm and corrosion products cover the steel surface. However, EIS might be used for detection of MIC. EN is a suitable technique to characterise the type of corrosion attack, but is unsuitable for corrosion rate estimation. The concentric electrodes galvanic probe arrangement initiates localised corrosion on the anode and seems applicable to evaluate the risk of MIC. Hydrogen permeation measurements are very useful to monitor hydrogen induced cracking accelerated by MIC.
    Original languageEnglish
    Title of host publicationMateriales Egenskaber - Modellering, måling, Anvendelse
    PublisherDansk Metallurgisk Selskab
    Publication date2000
    Publication statusPublished - 2000
    EventDansk Metallurgisk Selskabs Vintermøde 2000 - Sorø, Denmark
    Duration: 5 Jan 20007 Jan 2000


    ConferenceDansk Metallurgisk Selskabs Vintermøde 2000

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