Synthesis of new binary trimethoxyphenylfuran pyrimidinones as proficient and sustainable corrosion inhibitors for carbon steel in acidic medium: experimental, surface morphology analysis, and theoretical studies

IF 4.3 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

BMC Chemistry Pub Date : 2024-09-20 DOI:10.1186/s13065-024-01280-6

Hajar A. Ali, Ahmed. A. El-Hossiany, Ashraf S. Abousalem, Mohamed A. Ismail, Abd El-Aziz S. Fouda, Eslam A. Ghaith

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Abstract

In this study, synthesis and assessment of the corrosion inhibition of four new binary heterocyclic pyrimidinones on CS in 1.0 M hydrochloric acid solutions at various temperatures (30–50 °C) were investigated. The synthesized molecules were designed and synthesized through Suzuki coupling reaction, the products were identified as 5-((5-(3,4,5-trimethoxyphenyl)furan-2-yl)methylene)pyrimidine-2,4,6(1H,3H,5H)-trione (HM-1221), 2-thioxo-5-((5-(3,4,5-trimethoxyphenyl)furan-2-yl)methylene)dihydropyrimidine-4,6(1H,5H)-dione (HM-1222), 1,3-diethyl-2-thioxo-5-((5-(3,4,5-trimethoxyphenyl)furan-2-yl)methylene)dihydropyrimidine-4,6(1H,5H)-dione (HM-1223) and 1,3-dimethyl-5-((5-(3,4,5-trimethoxyphenyl)furan-2-yl)methylene)pyrimidine-2,4,6(1H,3H,5H)-trione (HM-1224). The experiments include weight loss measurements (WL), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP). From the measurements, it can be shown that the inhibition efficiency (η) of these organic derivatives increases with increasing the doses of inhibitors. The highest η recorded from EIS technique were 89.3%, 90.0%, 92.9% and 89.7% at a concentration of 11 × 10⁻⁶ M and 298 K for HM-1221, HM-1222, HM-1223, and HM-1224, respectively. The adsorption of the considered derivatives fit to the Langmuir adsorption isotherm. Since the ΔG^o_ads values were found to be between − 20.1 and − 26.1 kJ mol⁻¹, the analyzed isotherm plots demonstrated that the adsorption process for these derivatives on CS surface is a mixed-type inhibitors. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), atomic force microscope (AFM) and Fourier- transform infrared spectroscopy (FTIR) were utilized to study the surface morphology, whereby, quantum chemical analysis can support the mechanism of inhibition. DFT data and experimental findings were found in consistent agreement.

Graphical Abstract

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合成新型二元三甲氧基苯基呋喃嘧啶酮作为酸性介质中碳钢的高效、可持续缓蚀剂：实验、表面形貌分析和理论研究

本研究考察了四种新的二元杂环嘧啶酮的合成，并评估了它们在不同温度（30-50 °C）的 1.0 M 盐酸溶液中对 CS 的缓蚀作用。合成的分子是通过铃木偶联反应设计和合成的，产物被鉴定为 5-((5-(3,4,5-三甲氧基苯基)呋喃-2-基)亚甲基)嘧啶-2,4,6(1H,3H,5H)-三酮 (HM-1221)、2-硫酮-5-((5-(3,4,5-三甲氧基苯基)呋喃-2-基)亚甲基)二氢嘧啶-4、6(1H,5H)-二酮 (HM-1222)、1,3-二乙基-2-硫酮-5-((5-(3,4,5-三甲氧基苯基)呋喃-2-基)亚甲基)二氢嘧啶-4,6(1H、5H)-dione (HM-1223) 和 1,3-二甲基-5-((5-(3,4,5-三甲氧基苯基)呋喃-2-基)亚甲基)嘧啶-2,4,6(1H,3H,5H)-三酮 (HM-1224)。实验包括失重测量（WL）、电化学阻抗谱（EIS）和电位极化（PDP）。测量结果表明，这些有机衍生物的抑制效率（η）随着抑制剂剂量的增加而提高。在浓度为 11 × 10-6 M 和 298 K 时，HM-1221、HM-1222、HM-1223 和 HM-1224 的 EIS 技术记录到的最高 η 分别为 89.3%、90.0%、92.9% 和 89.7%。所考虑的衍生物的吸附符合 Langmuir 吸附等温线。由于发现 ΔGoads 值介于 - 20.1 和 - 26.1 kJ mol-1 之间，分析的等温线图表明这些衍生物在 CS 表面的吸附过程属于混合型抑制剂。利用扫描电子显微镜（SEM）、能量色散 X 射线光谱（EDX）、原子力显微镜（AFM）和傅立叶变换红外光谱（FTIR）研究了这些衍生物的表面形貌，量子化学分析为抑制机理提供了支持。DFT 数据与实验结果一致。

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来源期刊

BMC Chemistry Chemistry-General Chemistry

CiteScore

5.30

自引率

2.20%

发文量

审稿时长

27 weeks

期刊介绍： BMC Chemistry, formerly known as Chemistry Central Journal, is now part of the BMC series journals family. Chemistry Central Journal has served the chemistry community as a trusted open access resource for more than 10 years – and we are delighted to announce the next step on its journey. In January 2019 the journal has been renamed BMC Chemistry and now strengthens the BMC series footprint in the physical sciences by publishing quality articles and by pushing the boundaries of open chemistry.