Synergistic effect of 2-oleyl-1-oleylamidoethyl imidazoline ammonium methylsulfate and halide ions on the inhibition of mild steel in HCl |
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| Authors: | Songqing Hu Ailing Guo Yufeng Geng Xiaolin Jia Shuangqing Sun Jun Zhang |
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| Affiliation: | 1. College of Science, China University of Petroleum, Qingdao, Shandong 266555, China;2. Key Laboratory of New Energy Physics and Materials Science in Universities of Shandong (China University of Petroleum), China;3. Department of Jingmen Oil Transportation, Sinopec Pipeline Storage and Transportation Corporation, Jingmen, Hubei 448000, China |
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| Abstract: | The effect of 2-oleyl-1-oleylamidoethyl imidazoline ammonium methylsulfate (ODD) and halide ions on corrosion inhibition of mild steel in HCl solution has been studied by experimental and molecular dynamics simulation methods. Synergistic effects were observed between ODD and the halides, and the inhibition efficiency was found to follow the trend ODD–Cl− < ODD–Br− < ODD–I−. In molecular dynamics simulation, the analysis of fractional free volume and diffusion coefficient showed that the synergistic effect increased in the order ODD–Cl− < ODD–Br− < ODD–I−. The molecular dynamics simulation analysis agreed with the experimental results. |
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| Keywords: | Corrosion inhibitor Mild steel Polarization Molecular dynamics Scanning electron microscopy |
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