| ZHAO Hong-ran,ZHOU Yu-feng,LIU Shuan,SU Sheng-pei,YU Hai-bin.Corrosion Inhibition Performance of 2,3-dimercaptosuccinic Acid on Copper[J],44(10):79-85 |
| Corrosion Inhibition Performance of 2,3-dimercaptosuccinic Acid on Copper |
| Received:June 25, 2015 Revised:October 20, 2015 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2015.10.014 |
| KeyWord:2,3-dimercaptosuccinic acid thiol AC impedance spectroscopy copper corrosion inhibitor corrosion |
| Author | Institution |
| ZHAO Hong-ran |
1. College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha , China;2. Ningbo Institute of Materials Technologies and Engineering, Chinese Academy of Sciences, Ningbo , China |
| ZHOU Yu-feng |
Ningbo Institute of Materials Technologies and Engineering, Chinese Academy of Sciences, Ningbo , China |
| LIU Shuan |
Ningbo Institute of Materials Technologies and Engineering, Chinese Academy of Sciences, Ningbo , China |
| SU Sheng-pei |
College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha , China |
| YU Hai-bin |
Ningbo Institute of Materials Technologies and Engineering, Chinese Academy of Sciences, Ningbo , China |
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| Abstract: |
| Objective 2,3-dimercaptosuccinic acid(DMSA) was synthesized with maleic acid as raw material, to study the corrosion inhibition performance of DMSA on copper in 0. 5 mol/ L NaOH solution. Methods DMSA was prepared by methods of addition, elimination, addition and hydrolysis with maleic acid as raw material, the structure of which was then characterized by Fourier infrared spectroscopy (IR) and mass spectrometry (MS). The corrosion rates of copper in 0. 5 mol/ L NaOH supplemented with different concentrations of DMSA were investigated by static weight loss tests, the corrosion inhibition performance was investigated by polarization curves and electrochemical impendence spectroscopy (EIS), respectively. Copper surface corrosion morphology was observed by scanning electronmicroscopy (SEM). Results IR and mass spectrometry jointly confirmed that the target product was DMSA. The corrosion rates of Cu in 0. 5 mol / L NaOH were 7. 60, 3. 25, 2. 13 μg / ( cm2 ·h) with supplementation of 0, 2. 5, 5. 0 g / L DMSA, respectively. When the DMSA concentration in NaOH solution was 5. 0 g / L, the inhibition efficiency reached 94. 92% . Conclusion DMSA could absorb on the copper surface, decrease water erosion and increase the corrosion product film resistance and the charge transfer resistance. DMSA was an anodic inhibitor. |
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