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Utilizing Corrosion Damage Morphology As An Indicator Of Microbiologically Influenced Corrosion (MIC) In Oilfield Waters

Picture for Utilizing Corrosion Damage Morphology As An Indicator Of Microbiologically Influenced Corrosion (MIC) In Oilfield Waters
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Microbiologically Influenced Corrosion (MIC) is a major concern in process industries, particularly in the Oil and Gas sector. It is estimated that 25-30% of corrosion related failures in pipelines and industrial equipment can be attributed to MIC. The cost of metallic corrosion has been estimated to range between 2-3% of the gross domestic product (GDP) in developed countries and MIC certainly accounts for a significant fraction of the total cost of corrosion amounting to billions of dollars due to unexpected shutdowns, equipment replacement, mitigation strategies, etc.

Product Number: 51322-17687-SG
Author: Moavin Islam
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings and Linings , Coatings
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Microbiologically Influenced Corrosion (MIC) is a major concern in process industries, particularly in the Oil and Gas sector. MIC has been linked to numerous corrosion failures and it is estimated that 25-30% of corrosion related failures in pipelines and industrial equipment can be attributed to MIC, costing billions of dollars.
Close examination of extensive sessile bacteria data, water chemistry and the corrosion damage morphologies observed on corresponding corrosion coupons in different oil field waters (brackish, recycled, produced, effluent) over a period of some 10 years, indicated that there was a distinct relationship between the bacteria type, water chemistry and the corrosion damage pattern. The water analysis data indicated that waters with different TDS levels, influences the species of viable bacteria that existed. Very high TDS waters (such as effluent waters) are not viable for SRB (sulfate reducing bacteria) but are viable for GAnB (general anaerobic bacteria) and anaerobic APB (acid producing bacteria). A mixed consortia of SRB/GAB/GAnB can co-exist in lower TDS waters (such as brackish waters). The localized corrosion damage morphology is dependent on the bacteria species that is present. It may be possible to develop a pictorial guideline for identifying MIC on the basis corrosion damage morphology as an aid to developing biocide treatments and the forensic analysis of corrosion failures .

Microbiologically Influenced Corrosion (MIC) is a major concern in process industries, particularly in the Oil and Gas sector. MIC has been linked to numerous corrosion failures and it is estimated that 25-30% of corrosion related failures in pipelines and industrial equipment can be attributed to MIC, costing billions of dollars.
Close examination of extensive sessile bacteria data, water chemistry and the corrosion damage morphologies observed on corresponding corrosion coupons in different oil field waters (brackish, recycled, produced, effluent) over a period of some 10 years, indicated that there was a distinct relationship between the bacteria type, water chemistry and the corrosion damage pattern. The water analysis data indicated that waters with different TDS levels, influences the species of viable bacteria that existed. Very high TDS waters (such as effluent waters) are not viable for SRB (sulfate reducing bacteria) but are viable for GAnB (general anaerobic bacteria) and anaerobic APB (acid producing bacteria). A mixed consortia of SRB/GAB/GAnB can co-exist in lower TDS waters (such as brackish waters). The localized corrosion damage morphology is dependent on the bacteria species that is present. It may be possible to develop a pictorial guideline for identifying MIC on the basis corrosion damage morphology as an aid to developing biocide treatments and the forensic analysis of corrosion failures .

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