Case Study: Microbiologically-Influenced Corrosion

By: Dr. Ganiyu Jaiyeola, Element Wixom, 51229 Century  Court Wixom, MI, 48393

SUMMARY
Microbiologically-Influenced Corrosion (MIC) is corrosion that occurs as a result of biological activities of microbes (Bacteria, Fungi, Algae, etc).  Microbes form biofilms on alloy and polymer surfaces that enable them to corrode those surfaces.  MIC occurs mainly due to the corrosive chemicals that microbes generate from their biological activities.  Microbes are very resilient.  The following properties of microbes aid in MIC:

  •  Microbes can survive from 10 °F to 230 °F.
  • Microbes can tolerate a wide range of pH, salinity and pressure values provided that nutrients are available to an extent > 10 mg/L (10 ppm).
  • Some microbes can survive in environments containing more than 2 ppm of free chlorine.
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