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03574 EVALUATION OF CHEMICAL TREATMENTS IN NATURAL GAS SYSTEMS VS. MIC AND OTHER FORMS OF INTERNAL CORROSION USING CARBON STEEL COUPONS

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Product Number: 51300-03574-SG
ISBN: 03574 2003 CP
Author: Timothy P. Zintel, Derek A. Kostuck, Bruce A. Cookingham
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Monitoring of internal corrosion by some oil and gas operators has included analysis of gas, liquid, and solid samples in combination with corrosion detection devices such as weightloss coupons and electronic probes. Although these devices typically detect when significant uniform corrosion is occurring, they are often limited in their abilities in detecting localized attack whose initiation and development may be subtle. Also, correlations of gas/liquid compositions with corrosion measurements are sometimes difficult. Even when localized corrosion is able to be discerned, identification of the primary initiation mechanism is often overlooked. Since understanding the basis of the corrosion attack is important when implementing mitigation measures, it became apparent that an applicable method that gave such insight was crucial in administering an effective internal corrosion control program. Therefore, specially prepared coupons that allowed a combination of analytical techniques to be performed were developed for use in actual operating systems to detect microscopic pit initiation, including those determined to be due to microorganisms. Such coupons have been used successfully at hundreds of different monitoring sites in a variety of natural gas operating systems for twelve years with notable decreases in internal corrosion leaks and chemical expenditures. Keywords: Acid Producing Bacteria, APB, Biocide, Corrosion Inhibitor, Coupon, Electron Microscopy, Epifluorescence Microscopy, Microbiologically Influenced Corrosion, MIC, Planktonic, Sessile, Sulfate Reducing Bacteria, SRB
Monitoring of internal corrosion by some oil and gas operators has included analysis of gas, liquid, and solid samples in combination with corrosion detection devices such as weightloss coupons and electronic probes. Although these devices typically detect when significant uniform corrosion is occurring, they are often limited in their abilities in detecting localized attack whose initiation and development may be subtle. Also, correlations of gas/liquid compositions with corrosion measurements are sometimes difficult. Even when localized corrosion is able to be discerned, identification of the primary initiation mechanism is often overlooked. Since understanding the basis of the corrosion attack is important when implementing mitigation measures, it became apparent that an applicable method that gave such insight was crucial in administering an effective internal corrosion control program. Therefore, specially prepared coupons that allowed a combination of analytical techniques to be performed were developed for use in actual operating systems to detect microscopic pit initiation, including those determined to be due to microorganisms. Such coupons have been used successfully at hundreds of different monitoring sites in a variety of natural gas operating systems for twelve years with notable decreases in internal corrosion leaks and chemical expenditures. Keywords: Acid Producing Bacteria, APB, Biocide, Corrosion Inhibitor, Coupon, Electron Microscopy, Epifluorescence Microscopy, Microbiologically Influenced Corrosion, MIC, Planktonic, Sessile, Sulfate Reducing Bacteria, SRB
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03544 MICROSCOPIC DIFFERENTIATION OF INTERNAL CORROSION INITIATION MECHANISMS IN NATURAL GAS PIPELINE SYSTEMS

Product Number: 51300-03544-SG
ISBN: 03544 2003 CP
Author: Richard B. Eckert, Henry C. Aldrich, Chris A. Edwards, Bruce A. Cookingham
Publication Date: 2003
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An analytical approach that can discriminate between various forms of microscopic corrosion initiation has been employed in natural gas gathering and storage facilities.  Information provided by the analysis of electron microscope coupons has led toward the better understanding and diagnosis of the initial stages of internal corrosion in natural gas gathering and storage facilities.
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Product Number: 21017-SG
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HISTORICAL DOCUMENT. This standard outlines procedures for preparing, installing, and analyzing metallic corrosion coupons. Factors considered in the interpretation of results obtained from these corrosion coupons are also included for the use of oil and service industry personnel. This standard is maintained by TG 409.
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Product Number: 51300-03572-SG
ISBN: 03572 2003 CP
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