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10330 The Application of Corrosion Inhibitors to Prevent Localized Corrosion

Picture for 10330 The Application of Corrosion Inhibitors to Prevent Localized Corrosion
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Product Number: 51300-10330-SG
ISBN: 10330 2010 CP
Author: Alyn Jenkins
Publication Date: 2010
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Corrosion inhibitors are typically applied in oil and gas production to mitigate corrosion caused by the presence of acidic gases. The laboratory testing performed when evaluating corrosion inhibitors normally only assesses inhibitor efficacy in preventing general corrosion. However, the majority of corrosion failures that occur in oil and gas production can be attributed to localized corrosion. This paper describes the laboratory selection procedure performed to develop a corrosion inhibitor that was effective in preventing both localized and general corrosion. The results illustrate that to mitigate localized corrosion, a substantially higher inhibitor dose rate is required compared to the concentration needed to prevent general corrosion. The paper also gives details of the successful deployment of the corrosion inhibitor in an offshore oilfield. Corrosion monitoring data obtained from the field demonstrates that the product developed is providing effective corrosion protection and reduces the corrosion rate to < 0.1 mm/yr.

Key Words: corrosion inhibitor, localized corrosion
Corrosion inhibitors are typically applied in oil and gas production to mitigate corrosion caused by the presence of acidic gases. The laboratory testing performed when evaluating corrosion inhibitors normally only assesses inhibitor efficacy in preventing general corrosion. However, the majority of corrosion failures that occur in oil and gas production can be attributed to localized corrosion. This paper describes the laboratory selection procedure performed to develop a corrosion inhibitor that was effective in preventing both localized and general corrosion. The results illustrate that to mitigate localized corrosion, a substantially higher inhibitor dose rate is required compared to the concentration needed to prevent general corrosion. The paper also gives details of the successful deployment of the corrosion inhibitor in an offshore oilfield. Corrosion monitoring data obtained from the field demonstrates that the product developed is providing effective corrosion protection and reduces the corrosion rate to < 0.1 mm/yr.

Key Words: corrosion inhibitor, localized corrosion
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