How do biofilms contribute to microbiologically induced corrosion?
Biofilms are deposits of biological origin that form on surfaces such as the inside walls of pipes, process vessels, storage tanks, condensers and pumps. (Corrosion in process vessels is discussed in Introduction to Managing Internal Corrosion in Process Vessels.) These deposits, commonly referred to as slime, consist of both microbes and their extracellular products. In addition, inorganics such as calcium (Ca) and magnesium (Mg) salts, as well as other organic materials, may be found in these deposits.
Biofilms form because microbes readily attach to surfaces. Microbes realize certain advantages when growing in an attached or “sessile” mode as opposed to growing “planktonically” – that is, free-floating in the bulk water. If conditions are favorable, sessile microorganisms form biofilms.
Biofilms provide a low to no oxygen environment and create conditions that harbor problematic bacteria and microorganisms, including sulfate-reducing bacteria (SRB) that promote microbiologically induced corrosion (MIC).
More Q&As from our experts
- Who does microbiologically influenced corrosion affect most?
- How do you identify microbiologically influenced corrosion in water pipelines?
- How can pipeline leaks promote microbiologically influenced corrosion?
- Microbiologically Influenced Corrosion
- Process Vessel
- Fouling Organism
- Sulfate-Reducing Bacteria (SRB)
- Sidestream Device
- Pressure Vessel
Don't miss the latest corrosion content from Corrosionpedia!
Subscribe to our newsletter to get expert advice and top insights on corrosion science, mitigation and prevention. We create world-leading educational content about corrosion and how to preserve the integrity of the world’s infrastructure and assets.
- How to Properly Spec a Monolithic Isolation Joint
- Improving Pipeline Emissions: The Role of Flange Isolation Kits
- Epoxy Coatings 101: What Kind to Use and When
- An Innovative Solution to Traditional Plastic Isolation Gaskets
- Solvent Recycling: Acetone, MEK, Lacquer Thinner and Toluene
- Modeling Corrosion and Corrosion Protection
- Bituminous Coatings