Microbiologically influenced corrosion (MIC) refers to the influence of microorganisms on the kinetics of corrosion processes of metals and nonmetallic materials, caused by adhering to the interfaces (usually referred to as "biofilms"). The corrosion-relevant microbes like to attach to solids via exopolymeric substances (EPS), which give the main component of the slime and form biofilms at the solid-liquid interface. Not only single stains but also diverse bacterial communities (e.g., iron and manganese and sulfur oxidizers and reducers, slime formers, acid producers, etc.) are able to produce biofilm. There are gradients of microorganisms, oxygen concentrations, and pH values inside the biofilm, which consists mostly of water, microbial metabolites, exopolymeric substances, organic, and inorganic molecules of the aqueous environment. Beneath this biofilm, corrosion initiates and progresses resulting in localized corrosion that can lead, if remained uncontrolled, to pinholes and leaks. This chapter discusses the different microbes responsible for MIC in oil and gas industry, classification of microorganisms, MIC mechanisms, and biofilm development and factors necessary for its formation. Finally the chapter briefly discusses current knowledge gaps in understanding and managing MIC and future research and engineering trends to close these gaps.
|Title of host publication||Trends in Oil and Gas Corrosion Research and Technologies|
|Subtitle of host publication||Production and Transmission|
|Number of pages||24|
|Publication status||Published - Jun 14 2017|
- Microbes in gas and oil industry
- Microbiologically influenced corrosion
ASJC Scopus subject areas