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| Inhibition Performance of a New 3,5-dibromosalicylaldehyde-2-thenoyl Hydrazine Schiff Base for Carbon Steel in Oilfield Water and Relevant Molecular Dynamics Simulation |
| LIU Jie1, 2, LIU Zheng1, LIU Jin1, XIE Siwei1 |
1. College of Chemical and Biological Engineering, Guilin University of Technology, Guilin 541004, China;
2. SINOPEC Maoming Company, Maoming 525011, China |
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Abstract A new 3,5-dibromosalicylaldehyde-2-thenoyl hydrazine Schiff base compounds (L2) was synthesized. Its inhibition performance and adsorption behavior for carbon steel in a simulated oilfield water were investigated by electrochemical methods, scanning electron microscopy and molecular dynamics simulation respectively. The results indicated that L2 exhibits excellent corrosion inhibition performance for carbon steel in the simulated oilfield water, and also that in simulated oilfield waters with various pH values at different temperatures. The molecular dynamics simulation results proved that L2 molecules may parallel be adsorbed on the steel surface firmly via several reactive sites and packed together to form a dense monolayer to prevent the metal surface from water and corrosive medium in the liquid. In addition, L2 molecule monolayer can suppress the inwards migration of corrosive species. That is why L2 exhibits excellent corrosion inhibition performance.
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Received: 02 June 2013
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