Carbon chain length effect on salt-free imidazoline corrosion and aggregation

IF 1.9 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Surface Innovations Pub Date : 2025-05-02 DOI:10.1680/jsuin.24.00118

Xiaohui Zhou, Jun Li, Yakui Wang, Yajie Jiang, Zhifei Wang, Tao Geng, Lu Zhang, Yongsheng Lan

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引用次数: 2

Abstract

A series of salt-free imidazoline surfactants with different carbon chains was synthesized. The products were characterized by Fourier transform infrared spectrum (FTIR), nuclear magnetic resonance hydrogen spectrum (1H NMR), and nuclear magnetic resonance carbon spectrum (13C NMR). The corrosion inhibition effect of salt-free imidazoline inhibitors with different carbon chains was evaluated by the static weight loss method, the electrochemical method, and scanning electron microscope observation. The corrosion inhibition mechanism was analyzed by adsorption mode, and an energy-dispersive spectrometer was used to study the adsorption of corrosion inhibitors on the steel surface. Transmission electron microscope and dynamic light scattering were used to analyze the aggregation of surfactants. It was found that with the increase of the carbon chain, the corrosion inhibition efficiency of imidazoline increased first and then decreased, and the corrosion inhibitor aggregate increased. There are two explanations for the decrease of corrosion inhibition efficiency after the chain length is too long: when the carbon chain is too long, the bending of the carbon chain will lead to the adsorption layer of the surfactant on the steel surface is not close, and the adsorption capacity of the corrosion inhibitor on the surface of the steel sheet is weak when the carbon chain is too long. The long hydrophobic tail chain is entangled with each other, resulting in a larger aggregation of surfactant.

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碳链长度对无盐咪唑啉腐蚀和聚集的影响

合成了一系列不同碳链的无盐咪唑啉表面活性剂。采用傅里叶红外光谱（FTIR）、核磁共振氢谱（1H NMR）和核磁共振碳谱（13C NMR）对产物进行了表征。通过静态失重法、电化学法和扫描电镜观察，对不同碳链的无盐咪唑啉类缓蚀剂的缓蚀效果进行了评价。通过吸附方式分析了缓蚀剂的缓蚀机理，并利用能谱仪研究了缓蚀剂在钢表面的吸附作用。利用透射电子显微镜和动态光散射对表面活性剂的聚集进行了分析。结果发现，随着碳链的增加，咪唑啉的缓蚀效率先升高后降低，缓蚀剂集合体增加。链长过长后缓蚀效率下降有两种解释：当碳链过长时，碳链的弯曲会导致表面活性剂在钢表面的吸附层不紧密，当碳链过长时，缓蚀剂在钢板表面的吸附能力较弱。长疏水尾链相互缠绕，导致表面活性剂聚集较大。

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

Surface Innovations CHEMISTRY, PHYSICALMATERIALS SCIENCE, COAT-MATERIALS SCIENCE, COATINGS & FILMS

CiteScore

5.80

自引率

22.90%

发文量

期刊介绍： The material innovations on surfaces, combined with understanding and manipulation of physics and chemistry of functional surfaces and coatings, have exploded in the past decade at an incredibly rapid pace. Superhydrophobicity, superhydrophlicity, self-cleaning, self-healing, anti-fouling, anti-bacterial, etc., have become important fundamental topics of surface science research community driven by curiosity of physics, chemistry, and biology of interaction phenomenon at surfaces and their enormous potential in practical applications. Materials having controlled-functionality surfaces and coatings are important to the manufacturing of new products for environmental control, liquid manipulation, nanotechnological advances, biomedical engineering, pharmacy, biotechnology, and many others, and are part of the most promising technological innovations of the twenty-first century.