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Evaluation of Erosion-Corrosion Behavior of N80 Steel Under High Velocity Wet Gas Condition

Picture for Evaluation of Erosion-Corrosion Behavior of N80 Steel Under High Velocity Wet Gas Condition
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Erosion wear is an important cause of oilwell tubes failure in injection and production well. The erosion-corrosion behavior of N80 steel in wet gas pipeline with high gas velocity was studied by high temperature high pressure flow loop. The effects of temperature water content pressure and wall shear stress on erosion -corrosion have been examined. Corrosion rates of different testing periods were calculated through weight-loss method. The composition and morphology of the corrosion scale are characterized by energy dispersive X-ray spectroscopy and scanning electron microscopy analyses. The results indicated that the effect of corrosion in enhancing erosion is the synergy. Based on the results of experiments the critical shear force coefficient of erosion-corrosion is obtained to evaluate the erosion-corrosion behavior of N80 steel.Keywords: Erosion corrosion; Shear stress coefficient; N80 steel; Temperature; Water content; CO2 partial pressure; Wall shear stress

Product Number: 51319-13526-SG
Author: Yunan Zhang
Publication Date: 2019
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$20.00
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Microbiologically influenced corrosion (MIC) is one of the leading causes of equipment and pipeline failure in oil and gas industries. Cost-effective MIC management requires routine monitoring of microbial activities, periodic assessment of microbial risks in various operational systems, and accurate diagnosis of MIC failure. Traditionally, MIC diagnosis has been dependent on cultivation-based methods by inoculating liquid samples containing live bacteria into selective growth media, followed by incubation at a certain temperature for a pre-determined period of time. The conventional culturing techniques have been reported to severely underestimate the size of the microbial populations related to metal corrosion, among many inherited weaknesses of these techniques. As a result, accurate diagnosis of MIC failure is challenging because the conventional techniques often fail to provide a critical piece of evidence required for a firm diagnosis, i.e., the presence of corrosion-causing microorganisms in the failed metal samples. In this paper, we described applications of molecular microbiology methods in diagnosing MIC in a crude oil pipeline and crude processing facility. Molecular microbial analyses have provided a solid piece of evidence to firmly diagnose the MIC in a crude oil flow line, a stagnant bypass spool, and a global valve bypass pipe. The presence of a high number of corrosion-related microorganisms in upstream pipelines poses a high risk to downstream crude processing facilities for microbial contamination and corrosion failure in these facilities. An effective MIC management program should include routine monitoring of microbial activities and risk assessment, and effective mitigation program, such as scraping and biocide treatments.
Picture for ADVANCED PROCESS SIMULATION AND EROSION-CORROSION MODELING APPLIED TO MATERIAL SELECTION AND FITNESS
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51312-01255-ADVANCED PROCESS SIMULATION AND EROSION-CORROSION MODELING APPLIED TO MATERIAL SELECTION AND FITNESS

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ISBN: 01255 2012 CP
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Picture for Erosion-Corrosion Study of Oilfield Materials Due to Liquid Impact
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Erosion-Corrosion Study of Oilfield Materials Due to Liquid Impact

Product Number: 51315-6136-SG
ISBN: 6136 2015 CP
Author: Hadi Arabnejad Khanouki
Publication Date: 2015
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The goal of this work is to determine erosion-corrosion damage caused by liquid impact in the oil and gas industry.

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