Volume 14, Issue 3 (12-2024)
مهندسی خوردگی 2024, 14(3): 50-50 |
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Boroughani B, Qasemi M, Danaee I. Establishment of a General Specification for a Technical Evaluation Based on the Performance of Inhibitors Used in Sour Gas Service. مهندسی خوردگی 2024; 14 (3) :50-50
URL: http://journal.ica.ir/article-1-231-en.html
URL: http://journal.ica.ir/article-1-231-en.html
M.Sc. in Safety Engineering and Technical Inseption, Senior Corrosion Protection Engineer, EastOil and Gas Production Company Khangiran, Petroleum University of Technology Abadan & M.Sc. in Safety Engineering and Technical Inseption, Senior Corrosion Protection Engineer, EastOil and Gas Production Company Khangiran, Petroleum University of Technology Abadan
Abstract: (30 Views)
Effective protection of gas pipelines in sour gas wells, comprising H2S, condensate, and water, is crucial due to the severe corrosion caused by H2S, CO2, and high temperatures. In sour gas wells, the most critical method of protecting pipelines from internal corrosion is the injection of corrosion inhibitors to form a protective film. However, due to the lack of a precise standard for verifying the effectiveness of corrosion inhibitors used in sour gas environments and the insufficient correlation between laboratory results and field performance data, this study investigates the performance of four corrosion inhibitors and determines a comprehensive and accurate specification for the first time using linear polarization resistance, wheel, rotating cage, and field tests. Protection efficiency above 80, 70, 60 and 90 percent in the aforementioned tests (respectively) show that quaternary ammonium salt corrosion inhibitors outperform imidazoline-based inhibitors in sour gas environments due to their stronger electrostatic bonds with metal surfaces. Also, the acceptance criteria for definitive laboratory tests to eliminate field testing for new corrosion inhibitor samples in sour gas environments were presented as follows: If the corrosion inhibitor has a protective efficiency of 80, 70, 60 percent at a concentration of 50 ppm, and a protective efficiency of 90, 80, 70 percent at a concentration of 100 ppm in linear resistance polarization, rotating wheel, and rotating cage tests, it is approved for use in sour gas pipelines.
Type of Study: Research |
Subject:
General
Received: 2025/08/13 | Accepted: 2024/12/15 | Published: 2024/12/15
Received: 2025/08/13 | Accepted: 2024/12/15 | Published: 2024/12/15
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