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08325 Laboratory Evaluation and Modeling of API-L80/13Cr Galvanic Corrosion in CO2 Environment

Picture for 08325 Laboratory Evaluation and Modeling of API-L80/13Cr Galvanic Corrosion in CO2 Environment
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Product Number: 51300-08325-SG
ISBN: 08325 2008 CP
Author: Conchita Mendez and Colin Scott
Publication Date: 2008
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A laboratory evaluation was performed to assess the galvanic coupling corrosion of API L-80 carbon steel coupled with 13Cr in sodium chloride solution at 30 and 80°C and 100 psi of carbon dioxide (CO2). Electrochemical techniques where used (linear polarization and potentiodynamic polarization) with the un-coupled materials. Also the mixed potential and galvanic current change with time were measured after coupling using a zero resistance ammeter (ZRA). Two anode/cathode ratios were used (1:1 and 1:2). Some electrochemical impedance tests were done to determine the electrolyte resistance. Finite element (FE) analyses were also attempted to predict the extent and distribution of galvanic corrosion simulating two geometries (laboratory assembly and pipeline of different lengths).
A laboratory evaluation was performed to assess the galvanic coupling corrosion of API L-80 carbon steel coupled with 13Cr in sodium chloride solution at 30 and 80°C and 100 psi of carbon dioxide (CO2). Electrochemical techniques where used (linear polarization and potentiodynamic polarization) with the un-coupled materials. Also the mixed potential and galvanic current change with time were measured after coupling using a zero resistance ammeter (ZRA). Two anode/cathode ratios were used (1:1 and 1:2). Some electrochemical impedance tests were done to determine the electrolyte resistance. Finite element (FE) analyses were also attempted to predict the extent and distribution of galvanic corrosion simulating two geometries (laboratory assembly and pipeline of different lengths).
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