Monitoring Techniques for Microbially Influenced Corrosion of Carbon Steel

Lisbeth Rischel Hilbert

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

    Abstract

    Abstract Monitoring Techniques for Microbially Influenced Corrosion of Carbon Steel 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 publicationMonitoring Techniques Applicable for Monitoring Microbially Influenced Corrosion
    PublisherEuropean Commission
    Publication date2000
    Publication statusPublished - 2000
    EventBiocorrosion Network - Venice, Italy
    Duration: 5 Apr 2000 → …

    Conference

    ConferenceBiocorrosion Network
    CountryItaly
    CityVenice
    Period05/04/2000 → …

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