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| Electrochemical and quantum chemical study of purines as corrosion inhibitors for mild steel in 1 M HCl solution | |
| Yan, Ying1,2; Li, Weihua2; Cai, Lankun1; Hou, Baorong2 | |
| 2008-08-20 | |
| 发表期刊 | ELECTROCHIMICA ACTA
 |
| ISSN | 0013-4686 |
| 卷号 | 53期号:20页码:5953-5960 |
| 文章类型 | Article |
| 摘要 | The purines and its derivatives, such as, guanine, adenine, 2,6-diaminopurine, 6-thioguanine and 2,6-dithiopurine, were investigated as corrosion inhibitors for mild steel in 1 M HCl solution by weight loss measurements, electrochemical tests and quantum chemical calculations. The polarization curves of mild steel in the hydrochloric acid solutions of the purines showed that both cathodic and anodic processes of steel corrosion were suppressed. The Nyquist plots of impedance expressed mainly as a depressed capacitive loop with different compounds and concentrations. For all these purines, the inhibition efficiency increased by increasing the inhibitor concentration, and the inhibition efficiency orders are 2,6-dithiopurine > 6-thioguanine > 2,6-diaminopurine > adenine > guanine with the highest inhibiting efficiency of 88.0% for 10(-3) M 2,6-dithiopurine.; The purines and its derivatives, such as, guanine, adenine, 2,6-diaminopurine, 6-thioguanine and 2,6-dithiopurine, were investigated as corrosion inhibitors for mild steel in 1 M HCl solution by weight loss measurements, electrochemical tests and quantum chemical calculations. The polarization curves of mild steel in the hydrochloric acid solutions of the purines showed that both cathodic and anodic processes of steel corrosion were suppressed. The Nyquist plots of impedance expressed mainly as a depressed capacitive loop with different compounds and concentrations. For all these purines, the inhibition efficiency increased by increasing the inhibitor concentration, and the inhibition efficiency orders are 2,6-dithiopurine > 6-thioguanine > 2,6-diaminopurine > adenine > guanine with the highest inhibiting efficiency of 88.0% for 10(-3) M 2,6-dithiopurine. The optimized structures of purines, the Mulliken charges, molecular orbital densities and relevant parameters were calculated by quantum chemical calculations. The quantum chemical calculation results inferred that the adsorption belong to physical adsorption, which might arise from the pi stacking between the pi electron of the purines and the metal surface. (C) 2008 Elsevier Ltd. All rights reserved. |
| 关键词 | Purines Mild Steel Corrosion Inhibitor Electrochemical Measurement Quantum Chemical Calculation |
| 学科领域 | Electrochemistry |
| DOI | 10.1016/j.electacta.2008.03.065 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000257011400013 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/5178 |
| 专题 | 海洋环境腐蚀与生物污损重点实验室 |
| 作者单位 | 1.E China Univ Sci & Technol, Coll Resource & Environm Engn, Shanghai 200237, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 26607, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Yan, Ying,Li, Weihua,Cai, Lankun,et al. Electrochemical and quantum chemical study of purines as corrosion inhibitors for mild steel in 1 M HCl solution[J]. ELECTROCHIMICA ACTA,2008,53(20):5953-5960. |
| APA | Yan, Ying,Li, Weihua,Cai, Lankun,&Hou, Baorong.(2008).Electrochemical and quantum chemical study of purines as corrosion inhibitors for mild steel in 1 M HCl solution.ELECTROCHIMICA ACTA,53(20),5953-5960. |
| MLA | Yan, Ying,et al."Electrochemical and quantum chemical study of purines as corrosion inhibitors for mild steel in 1 M HCl solution".ELECTROCHIMICA ACTA 53.20(2008):5953-5960. |
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