| 何毅,杨冉冉,王雅洁,李飞,刘松.化学通报,2016,79(3):248-253. |
| 蛋氨酸衍生物缓蚀剂的合成与性能研究 |
| The synthesis and property study of the methionine derivative corrosion inhibitor |
| 投稿时间：2015-08-30 修订日期：2015-10-31 |
| DOI： |
| 中文关键词: 缓蚀剂,电化学测试,SEM,吸附 |
| 英文关键词:Inhibitor Electrochemical test SEM Adsorption |
| 基金项目: |
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| 摘要点击次数: 2742 |
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| 中文摘要: |
| 通过酰胺化反应以蛋氨酸为基础合成一种新型的蛋氨酸衍生物缓蚀剂，应用极化曲线、电化学阻抗谱图研究蛋氨酸及其衍生物在3%NaCl溶液中对N80碳钢的缓蚀作用，利用SEM方法观察添加缓蚀剂过后钢片表面的腐蚀形貌，并从分子结构上探讨了缓蚀剂在碳钢表面的作用机理。研究结果表明：蛋氨酸及其衍生物都属于阳极型缓蚀剂，且缓蚀率随着添加浓度增加而增加。添加250 mg?L-1蛋氨酸衍生物在3%NaCl溶液中对N80碳钢的缓蚀率达到86.94%。相同浓度条件下蛋氨酸衍生物的缓蚀率要高于蛋氨酸，其原因是蛋氨酸衍生物分子结构中增加了吸附位点和疏水长链。 |
| 英文摘要: |
| A newly methionine derivative corrosion inhibitor is synthesized on the basis of methionine by amidation, methionine and its derivative are investigated in the aggressive condition of 3wt.% sodium chloride solution for the protection of N80 steel with potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM). We also explored the mechanism of corrosion inhibitor on carbon steel surface by molecular structure level. Meanwhile, referring to the potentiodynamic polarization tests the methionine and its derivative act as the anodic type inhibitor. What’s more, the corrosion rate increased with the addition of inhibitor concentrations. Additionally, with 250 mg?L-1 methionine derivative dosage in the aggressive condition of 3 wt.% NaCl solution for N80 carbon steel, the efficiency increases approximately 86.94%.The same concentration of methionine derivative inhibition efficiency is superior to methionine, the reason is that the molecular structure of methionine derivative increased adsorption sites and hydrophobic long chain. |
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