Microbiologically Induced Corrosion

Course Overview

Water can enter into the pipelines in various ways, either at pre-commissioning phase (hydrotesting) or during commissioning and use. Even if the operating temperature is above the dew point, one must not forget that due to factors, such as but not limited to, existing of low points and temperature fluctuation and operation age of the line, water can be collected inside the pipe. It is also interesting to note that as long as water exists (even as water pockets) within the line, the likelihood of both electrochemical and electrochemical-microbial corrosion in the form of internal corrosion, manifested as pitting, will highly increase.

In addition, one has to know that there are two approaches towards microbial corrosion cases” study of the case as per system” and “study of the case as per material”l. In other words, if one knows under what conditions for instance carbon steel corrodes by microbes, it doesn’t matter if the system in which carbon steel has been used in, is a pipeline or a tank and whether if it is in a power plant or a gas refinery.

On the other hand, Hydrotesting (or alternatively, hydrostatic testing) is an industrial practice that is of frequent use in industry. The main characteristic of hydrotesting is that it is a “leak” and “strength” test. There are many factors that can be involved in making a system vulnerable to microbiologically influenced corrosion (MIC). Of the four principle corrosion mechanisms that can be expected to see, MIC is the mostprobable/ important one in a post-hydrotest failure. More ever, when pigging is done (intelligent pigging for instance) it is quite possible that it will increase the risk of MIC as well.

Course Key Takeaway

Have a better understanding of the importance of routine recognition and treatment methods of MIC
Failure mechanisms in hydrant systems and hydro tested systems
Recognize MIC from other types of corrosion manifestations

Estimate the required resources and human factors necessary to control MIC in a more feasible manner
Comment on limitations of corrosion prediction software’s about MIC
Have learned the most sensible and trustful way of MIC treatment

Understand Corrosion (especially microbial corrosion) mitigation methods more efficiently
Give advise on materials selection and biocide control
Differentiate “myths” from “realities” in MIC mitigation

Who Should Attend


  • Corrosion & Inspection
  • Supervisors
  • Cathodic Protection

  • Specialist/Engineer

  • Inspection Engineer

  • Asset Integrity Engineers and Supervisors

  • Corrosion Engineer
  • Engineering Manager
  • RBI Engineer
  • NDT Technician

  • Reliability Engineer

  • Pipeline Operators
  • Pipeline Engineer
  • Plant Engineer
  • Plant Operator
  • Process Engineer

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