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Relationship between Structure of Imidazoline Derivates with Corrosion Inhibition Performance in CO2/H2S Environment |
Jingmao ZHAO1,2(),Qifeng ZHAO1,Riujing JIANG1,2 |
1 College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China 2 Beijing University of Chemical Technology, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing 100029, China |
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Abstract Four oleic acid-based imidazoline derivates with different hydrophilic groups were synthesized in this work. The performance of the synthesized products, such as the hydrophobicity and hydrophily, the adsorption and corrosion inhibition on the 20# carbon steel in flow CO2/H2S environment were assessed by means of measurements of contact angle, AFM force curve and mass loss, as well as molecular dynamics simulation. The results showed that under static conditions the imidazoline derivate with two amino ethylene units processes the best inhibition efficiency of 86.8% for the dosage of 100 mg/L, while under high flow rate (5.5 m/s), the inhibition efficiency of imidazoline with three amino ethylene units was the highest, i.e. 73.6% for the dosage of 100 mg/L. The hydrophobicity, adhesion force and adsorption energy of imidazolines were enhanced gradually with the increase of the number of amino ethylene unit.
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Received: 10 January 2016
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Fund: Supported by National Natural Science Foundation of China (51171013) |
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