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| Effect of Flow Velocity and Carbon Chain Length on Corrosion Inhibition Performance of Imidazoline Derivates in High Pressure CO2 Environment |
ZHAO Tong1, ZHAO Jingmao1,2( ), JIANG Ruijing1,2 |
1. College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
2. Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China |
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Abstract Five imidazoline derivates with different carbon chain length and two imidazoline derivates with double bond in carbon chain were synthesized. Their inhibition performance, adsorption capacity and hydrophobicity were studied in high CO2 pressured solution by means of dynamic mass loss method, SEM, AFM, and contact angle measurement. By contact angle measurement, it was found that the hydrophobic performance of imidazoline derivate with 21 carbon chain length was the best, and the contact angle was 80.5°, 87.8° and 96.2° respectively corresponding to its concentration of 50, 100 and 200 mg/L. By the AFM force curves, it was also found that the longer the carbon chain, the larger the adhesion force. When the chain length was 21, the adhesion reached the highest. The dynamic weight loss experiment showed that the inhibition performance of the imidazoline derivates was related to both the chain length and the flow velocity of the solution. When the flow rate was 0.3 and 0.6 m/s, the derivate with 17 carbons in carbon chain was the best and when the flow rate was 5.5 m/s, the longer the carbon chain of imidazoline, the better the inhibition performance. The inhibition performance of imidazoline with double bonds in carbon chain was always better than the one without double bonds under the same condition.
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Received: 19 May 2014
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