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| Corrosion Inhibition of Lauric Acid in Supercritical CO2/H2O Condition |
| Received:February 07, 2020 Revised:February 24, 2020 |
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| DOI：10.7643/issn.1672-9242.2020.10.009 |
| KeyWord:CO2 corrosion lauric acid N80 carbon steel |
| Author | Institution |
| ZHANG De-ping |
School of Petroleum Engineering, Northeast Petroleum University, Daqing , China;CCS-EOR Company, PetroChina Jilin Oil Field Company, Songyuan , China |
| CEN Hong-yu |
School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan , China |
| CHEN Zhen-yu |
School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan , China |
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| Abstract: |
| The work aims to find out the action mechanism of corrosion inhibitor in supercritical CO2/H2O medium and select reliable corrosion inhibitor. Corrosion inhibition performance of lauric acid on carbon steel in supercritical CO2 was investigated by electrochemical measurements, dynamic weight loss tests and surface morphology analysis. Lauric acid was a mixed-type corrosion inhibitor and could effectively protect carbon steel from CO2 corrosion. When the system changes from non-supercritical CO2 state to supercritical CO2 state, the film of lauric acid on the surface of carbon steel is denser and has obvious hydrophobic effect, and the corrosion inhibition efficiency is obviously improved. |
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