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51316-7365-Characteristic Corrosion Morphological Features Associated with

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Product Number: 51316-7365-SG
ISBN: 7365 2016 CP
Author: Abdul Razzaq Al-Shamari
Publication Date: 2016
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It is well known that the localized corrosion damage morphology observed in the case of microbiologically induced corrosion (MIC) shows some characteristic features depending on the type of sessile bacteria species. Thus in the case of sulfate reducing bacteria (SRB) the corrosion damage is reported to manifest itself as wide pits with terraced features. Some strains of acid producing bacteria (APB) cause corrosion damage which show pits within pits or tunneling.At the Kuwait Oil Company (KOC) a variety of bacteria species (SRB GAB and GAnB) have been identified in the different types of process waters that are available in the company facilities. Extensive corrosion coupon monitoring as well as fluid and bacteria analyses are routinely conducted by the company and based on years of observation of the corrosion morphology of the coupons it has been possibly to establish a correlation between the characteristic morphological features and the different bacteria species found in the company waters. Thus the morphology of attack encountered in Effluent Water streams which has no SRB species but an abundance of GAnB appear like serrations (deep scratches) with small craters on the surface. This is distinctly different from the morphology due to SRB attack which appear like terraced pits typically observed in Brackish Water and Seawater streams.Key Words: Microbiologically Induced Corrosion (MIC) Oilfield waters Corrosion Morphology SRB GAB GAnB
It is well known that the localized corrosion damage morphology observed in the case of microbiologically induced corrosion (MIC) shows some characteristic features depending on the type of sessile bacteria species. Thus in the case of sulfate reducing bacteria (SRB) the corrosion damage is reported to manifest itself as wide pits with terraced features. Some strains of acid producing bacteria (APB) cause corrosion damage which show pits within pits or tunneling.At the Kuwait Oil Company (KOC) a variety of bacteria species (SRB GAB and GAnB) have been identified in the different types of process waters that are available in the company facilities. Extensive corrosion coupon monitoring as well as fluid and bacteria analyses are routinely conducted by the company and based on years of observation of the corrosion morphology of the coupons it has been possibly to establish a correlation between the characteristic morphological features and the different bacteria species found in the company waters. Thus the morphology of attack encountered in Effluent Water streams which has no SRB species but an abundance of GAnB appear like serrations (deep scratches) with small craters on the surface. This is distinctly different from the morphology due to SRB attack which appear like terraced pits typically observed in Brackish Water and Seawater streams.Key Words: Microbiologically Induced Corrosion (MIC) Oilfield waters Corrosion Morphology SRB GAB GAnB
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