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Effect of Double Bonds in Hydrophobic Chains on Corrosion Inhibition Performance of Imidazoline Derivates in Dynamic H2S/CO2 Environment |
Jingmao ZHAO1,2( ),Xiong ZHAO1,Ruijing JIANG1,2 |
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 100029, China |
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Abstract Four imidazoline derivates were synthesized using diethylenetriamine with stearic acid, oleic acid, n-docosanoic acid and erucic acid respectively as raw materials. Then the inhibition performance and adsorption capacity on the carbon steel surface and the ability of hydrophobic of the prepared derivates were studied in dynamic H2S/CO2 environment by means of dynamic weight loss test, SEM, AFM, contact angle measurement and molecular dynamics simulation. The measurememnt results for contact angle and AFM force showed that the hydrophobic effect is better and the adhesion force is bigger respectively for imidazoline derivatives with double bonds in their hydrophobic chains. The surface adsorption energy of the four imidazoline derivatives on the face of Fe (001) were calculated by using molecular dynamic simulation, the results indicated that the surface adsorption energy of imidazoline which has double bonds in hydrophobic chain was larger than that one without double bonds. The theoretical evaluation of corrosion inhibition performance of four imidazoline derivates accorded well with the experiment results.
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