| ZHANG Jin-liang,LIANG Hui-jun,JIN Xiang-hong,LIU Xin-wen,HONG Xiao-bo.Determination of Corrosion Inhibition of Copper in 0.5 mol/L Sulfuric Acid Solution by Anethole Trithione as a New High-efficiency Corrosion Inhibitor[J],48(10):292-300 |
| Determination of Corrosion Inhibition of Copper in 0.5 mol/L Sulfuric Acid Solution by Anethole Trithione as a New High-efficiency Corrosion Inhibitor |
| Received:January 20, 2019 Revised:October 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.10.036 |
| KeyWord:anethole trithione corrosion inhibitor copper electrochemical test langmuir monolayer adsorption |
| Author | Institution |
| ZHANG Jin-liang |
1.School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo , China |
| LIANG Hui-jun |
2.Sinopec Oil & Gas Pipe Line Inspection Co., Ltd, Xuzhou , China |
| JIN Xiang-hong |
1.School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo , China |
| LIU Xin-wen |
1.School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo , China |
| HONG Xiao-bo |
1.School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo , China |
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| Abstract: |
| The work aims to investigate the corrosion inhibition performance of anethole trithione for copper in sulfuric acid solution. Electrochemical impedance spectroscopy and potentiodynamic polarization curves were used to investigate the corrosion inhibition performance of anethole trithione on copper in sulfuric acid solution at different temperature. Scanning electron microscopy and atomic force microscopy were used to observe the surface morphology of copper samples under different conditions. A variety of adsorption isotherms were fitted by polarization curve data to explore the adsorption type of anethole trithione on copper surface. Electrochemical test results showed that when the anethole trithione concentration was 5 mmol/L, the inhibition efficiency was as high as 97.8% at 25 ℃, and the corrosion inhibition efficiency increased with the increase of temperature. At the temperature of 40 ℃, the concentration of anethole trithione was 5 mmol/L and the corrosion inhibition efficiencies obtained by polarization curve and impedance spectroscopy were 98.9% and 99.8%, respectively. In addition, the results of scanning electron microscopy and atomic force microscopy strongly supported the fact that anethole trithione could effectively slow the corrosion of copper in sulfuric acid medium. Through the adsorption isotherm model, it was found that the adsorption of anethole trithione on copper surface accorded with Langmuir monolayer adsorption. The values of DG0 ads at 25, 30, 35 and 40 ℃ were –31.36, –33.80, –36.87 and –37.13 kJ/mol. Anethole trithione has good corrosion inhibition effect on copper in sulfuric acid solution, and its corrosion inhibition performance increases with increasing temperature. The values of DG0 ads indicate that the adsorption of anethole trithione on the copper surface is a combination of physical and chemical adsorption, and the effect of chemisorption is more pronounced with increasing temperature. |
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