Abbas Mohamed A, Ismail Amr S, Zakaria K, El-Shamy A M, El Abedin S Zein
Petroleum Applications Department, Egyptian Petroleum Research Institute, P.B. 11727, Nasr City, Cairo, Egypt.
Petrochemicals Department, Egyptian Petroleum Research Institute, P.B. 11727, Nasr City, Cairo, Egypt.
Sci Rep. 2022 Jul 22;12(1):12536. doi: 10.1038/s41598-022-16755-6.
The purpose of this work lies in the use of ionic liquids as corrosion inhibitors due to the difficulty in some oil fields with the solubility of corrosion inhibitors and these materials can be miscible with water and thus provide a solution to such problems in the industry. The second purpose is concerned with the lower toxicity of these compounds compared with the most common corrosion inhibitors. The study covered the corrosion inhibition performance of the ionic liquid 1-butyl-3-methylimidazolium trifluoromethyl sulfonate ([BMIm]TfO) for carbon steel in 3.5% NaCl solutions. The study comprised electrochemical, adsorption, and quantum chemical investigations. The results manifested that [BMIm]TfO can be considered a promising corrosion inhibitor and the inhibition efficacy intensifies as the concentration rises. The observed inhibitive effect can be correlated to the adsorption of the ionic liquid species and the creation of protecting films on the surface. The mode of adsorption follows the Langmuir adsorption isotherm. The polarization results showed that the ionic liquid [BMIm]TfO functions as a mixed inhibitor. Reliance of the corrosion influence on the temperature in the existence and absence of [BMIm]TfO was demonstrated in the temperature range of 303-333 K using polarization data. Activation parameters were determined and discussed. The observed inhibition performance of [BMIm]TfO was correlated with the electronic properties of the ionic liquid using a quantum chemical study.
由于一些油田中缓蚀剂的溶解性存在困难，且这些材料可与水混溶，因此这项工作的目的在于使用离子液体作为缓蚀剂，从而为该行业中的此类问题提供解决方案。第二个目的涉及与最常见的缓蚀剂相比，这些化合物的毒性更低。该研究涵盖了离子液体1-丁基-3-甲基咪唑三氟甲磺酸盐（[BMIm]TfO）在3.5% NaCl溶液中对碳钢的缓蚀性能。该研究包括电化学、吸附和量子化学研究。结果表明，[BMIm]TfO可被视为一种有前景的缓蚀剂，且随着浓度的增加，缓蚀效果增强。观察到的缓蚀作用可与离子液体物种的吸附以及表面保护膜的形成相关联。吸附模式遵循朗缪尔吸附等温线。极化结果表明，离子液体[BMIm]TfO起混合缓蚀剂的作用。利用极化数据，在303 - 333 K的温度范围内证明了在有和没有[BMIm]TfO的情况下，腐蚀影响对温度的依赖性。确定并讨论了活化参数。使用量子化学研究将观察到的[BMIm]TfO的缓蚀性能与离子液体的电子性质相关联。
