| 刘琳,刘璐,张艳萍,张强.化学通报,2014,77(11):1127-1130. |
| 噻二唑衍生物对银的缓蚀性能研究 |
| Corrosion Inhibition of Silver Strip by Thiadiazole Derivative |
| 投稿时间：2014-02-11 修订日期：2014-03-17 |
| DOI： |
| 中文关键词: 噻二唑 喷气燃料 增重 接触角 分子反应动力学 |
| 英文关键词:thiadiazole, jet fuel, weight gain, CA, molecular reaction dynamics |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
|
| 摘要点击次数: 2453 |
| 全文下载次数: 0 |
| 中文摘要: |
| 本文研究了主要成分为5-甲基-2-戊基二硫代-1,3,4-噻二唑的复配型缓蚀剂TSJ-T6,在浓度为5.0 × 10-5 g.g-1的H2S中的对银的缓蚀性能。通过增重实验、接触角分析、电化学极化曲线测试以及分子动力学模拟研究了该缓蚀剂的缓蚀效率及缓蚀机理。增重实验结果证明,缓蚀剂TSJ-T6对银片在H2S中的腐蚀具有良好的缓蚀剂效果,缓蚀剂浓度为2.5 × 10-5 g.g-1时,缓蚀效率高达94.51%。接触角分析结果表明该缓蚀剂分子在银片和腐蚀液的界面形成了一层疏水保护膜。极化曲线结果表明缓蚀剂TSJ-T6的存在降低了阴、阳极的塔菲尔斜率,为混合型缓蚀剂；同时,该缓蚀剂的存在显著降低了腐蚀电流密度,表明该缓蚀剂对银片在H2S中的腐蚀有良好的缓蚀效果。分子动力学模拟表明,缓蚀剂分子通过噻二唑环和链上的硫、氮原子吸附在银表面,烷基链则以一定角度指向溶液。 |
| 英文摘要: |
| In this paper, the anti-corrosion property of thiadiazole derivative on silver strip in 5.0×10-5 g.g-1 H2S solution is reported. The inhibition efficiency is investigated by the contact angel analysis (CA), the potentiondynanic polarization measurement and the molecular reaction dynamics. Weight gain experimental results show that TSJ-T6 has excellent corrosion inhibition performance and the most effective concentration of inhibitor is 2.5 × 10-5 g.g-1, when the inhibition efficiency can reach 94.37%. CA results show that hydrophobic dense layer is formed on the metal/solution interface during to the adsorption of inhibitor. Potertiondynamic polarization measurement results indicate that the existence of inhibitor significantly decrease the cathodic, the anodic Tafel slopes and the corrosion currents. Meanwhile, for the silver strip in jet fuel, the inhibitor works well when the concentration of the inhibitor is low. The study about molecular reaction dynamics proves that the inhibitor absorbs on the surface of silver because of the interaction between Ag and the S, N atoms. And the alkyl chain points to solutions at an angle. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|