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98037 ASPECTS OF CORROSION INHIBITOR SELECTION AT ELEVATED TEMPERATURES

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Product Number: 51300-98037-SG
ISBN: 98037 1998 CP
Author: J. Kolts, M.W. Joosten, P.G. Humble, J. Clapham
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Corrosion inhibitors were evaluated in a flow loop apparatus, for a subsea production flowline application in a major gas condensate project. The design temperature for the prediction was 115°C, with a considerable CO2 presence. Acceptable corrosion inhibitors were identified in this examination. However, the evaluation demonstrated that the presently available green inhibitors were not suitable. The corrosion performance was strongly dependent on temperature, especially above around 90°C. Most inhibitors performed well (less than 0.025 mm/y or 1 mpy) in the static environment, but exhibited poorer performance in the flowing (4 m/s) condition. Elevated temperature performance was associated with separation of the hydrocarbon and aqueous phases. This study was influenced by the general lack of corrosion inhibitor partitioning data available in the industry. Key Words: Corrosion, Subsea, Inhibitors, Testing, Flowloop, and Temperature
Corrosion inhibitors were evaluated in a flow loop apparatus, for a subsea production flowline application in a major gas condensate project. The design temperature for the prediction was 115°C, with a considerable CO2 presence. Acceptable corrosion inhibitors were identified in this examination. However, the evaluation demonstrated that the presently available green inhibitors were not suitable. The corrosion performance was strongly dependent on temperature, especially above around 90°C. Most inhibitors performed well (less than 0.025 mm/y or 1 mpy) in the static environment, but exhibited poorer performance in the flowing (4 m/s) condition. Elevated temperature performance was associated with separation of the hydrocarbon and aqueous phases. This study was influenced by the general lack of corrosion inhibitor partitioning data available in the industry. Key Words: Corrosion, Subsea, Inhibitors, Testing, Flowloop, and Temperature
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