In situ study of the interactions between metal surfaces and cationic surfactant corrosion inhibitors by surface-enhanced Raman spectroscopy coupled with visible spectroscopy†

IF 3.6 3区 化学 Q2 CHEMISTRY, ANALYTICAL
Analyst Pub Date : 2024-08-26 DOI:10.1039/D4AN00861H
Felix Frank, Daniela Tomasetig, Peter Nahringbauer, Wolfgang Ipsmiller, Gerd Mauschitz, Karin Wieland and Bernhard Lendl
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Abstract

Cationic surfactants are widely used as corrosion inhibitors for industrial tubings and pipelines. They protect the surface of steel pipes through a film-forming mechanism, providing both anodic and cathodic inhibition. To improve the efficiency of the corrosion protection, it is essential to understand the interactions between the surfactants and metal surfaces. To achieve this, surface enhanced Raman spectroscopy (SERS) can serve as a powerful tool due to its surface sensitivity and potential to detect trace amounts of analytes in complex media. In this contribution, we have investigated the behaviour of in situ prepared AgNPs in the presence of benzalkonium chloride as a model corrosion inhibitor using SERS coupled to visible spectroscopy and combined with light scattering methods. By combining these experimental methods, we were able to correlate the aggregation of silver particles with the concentration of added surfactant in the resulting mixture. Using this insight, we also established a SERS method for the detection of benzalkonium chloride traces in water. For this, we utilised the quenching of the SERS response of methylene blue by competitive adsorption of methylene blue and the surfactant on SERS active AgNPs. We believe that our approach can serve a variety of applications to improve the industrial water treatment. For example, the modelling of the interaction of different surfactants with SERS can be used for process intensification, and ultimately, to move towards the digital twinning of corrosion processes for more efficient corrosion inhibition. Furthermore, the ability to adapt our sensing protocol for on-line corrosion inhibitor monitoring allows a fast response to process changes, hence, enabling resource-efficient, continuous process control.

Abstract Image

利用表面增强拉曼光谱和可见光谱对金属表面与阳离子表面活性剂缓蚀剂之间的相互作用进行原位研究
阳离子表面活性剂被广泛用作工业管道的缓蚀剂。它们通过成膜机制保护钢管表面,提供阳极和阴极抑制作用。为了提高防腐效率,了解表面活性剂与金属表面之间的相互作用至关重要。为此,表面增强拉曼光谱(SERS)因其表面灵敏度和在复杂介质中检测痕量分析物的潜力而成为一种强大的工具。在这篇论文中,我们使用 SERS 与可见光光谱相结合,并结合光散射方法,研究了原位制备的银纳米粒子在苯扎氯铵作为模型缓蚀剂存在下的行为。通过结合这些实验方法,我们能够将银粒子的聚集与所得混合物中添加的表面活性剂的浓度联系起来。利用这一洞察力,我们还建立了一种检测水中苯扎氯铵痕量的 SERS 方法。为此,我们利用亚甲基蓝和表面活性剂在 SERS 活性银胶体上的竞争性吸附淬灭了亚甲基蓝的 SERS 响应。我们相信,我们的方法可用于改善工业用水处理的各种应用。例如,不同表面活性剂与 SERS 的相互作用建模可用于实现腐蚀过程的数字化孪生,从而提高缓蚀效率。然后,还可以结合我们的传感协议进行在线缓蚀剂监测,以便更快地对工艺变化做出反应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Analyst
Analyst 化学-分析化学
CiteScore
7.80
自引率
4.80%
发文量
636
审稿时长
1.9 months
期刊介绍: The home of premier fundamental discoveries, inventions and applications in the analytical and bioanalytical sciences
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