用于低碳钢可持续维护和牺牲阳极保护的氧/石墨氮化碳智能纳米涂层的综合研究

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Journal of chemical technology and biotechnology Pub Date : 2024-10-05 DOI:10.1002/jctb.7764

Ashraf Morsy, Monica Toderas, Adel El-marghany, Dipak Rana, Mahmoud Abdelaty, Fathy Shokry, M.E. Mohamed, D.E. Abd-El-Khalek, Mai.I. Elkaliuoby, Elsayed G Blall

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引用次数: 0

摘要

本研究将光催化剂掺杂的含银（Ag）和氧（O₂）的石墨氮化碳（g-C₃N₄）纳米片加入到太阳能光活性聚酯（PE）光电化学防腐涂料中，以提高低碳钢（MS）的耐腐蚀性。目的是通过可见光激活提供牺牲阳极保护。结果所制备的涂料在质谱表面形成均匀的薄膜，在可见光下有效地提供阳极保护。表征技术，包括能量色散x射线光谱（EDX），透射电子显微镜（TEM），傅里叶变换红外光谱（FTIR）和紫外可见光谱，证实了纳米片的分子结构。通过失重测量和开路电位（OCP）测试评估的耐腐蚀性表明，在优化浓度为15 mg的情况下，添加Ag/g-C₃N₄和Ag- o₂/g-C₃N₄纳米片显著提高了耐腐蚀性。保护效率排名如下:O₂- g / C₃N₄祝辞O-g N / C₃₄祝辞Ag-O₂/ g C₃N₄祝辞Ag-g N / C₃₄祝辞g C₃N₄。在海水中浸泡28天后，O₂/g-C₃N₄包被的MS的减重最小，缓蚀率可达99%。电化学阻抗谱（EIS）进一步证明了O₂/g-C₃N₄涂层的耐涂层性增强（Rct = 3.76 kΩ）。cm2, Rcoat = 1.69 kΩ.cm2)与纯PE相比（Rct = 0.005 kΩ）。cm2, Rcoat = 0.096 kΩ.cm2)。结论合成的O₂/g-C₃N₄和Ag-O₂/g-C₃N₄纳米片具有高的比表面积和增强的水分散性，对ms具有显著的防腐蚀作用。电化学性能（包括重量减轻和OCP测量）突出了这些纳米片光催化剂在推进耐腐蚀技术方面的潜力，在材料科学和工程应用中具有广泛的意义。©2024化学工业学会（SCI）。

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A comprehensive investigation of oxygen/graphite carbon nitride smart Nano coatings for sustainable maintenance and sacrificial anode protection of mild steel

BACKGROUND

This study enhancing the corrosion resistance of mild steel (MS) by incorporating photo-catalyst-doped graphitic carbon nitride (g-C₃N₄) nano-sheets containing silver (Ag) and oxygen (O₂) into a solar light-active photoelectrochemical anticorrosion paint with polyester (PE). The objective is to provide sacrificial anode protection through visible light activation.

RESULTS

The developed paint forms a uniform film on the MS surface, effectively providing anodic protection under visible light. Characterization techniques, including energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), and UV–Vis spectroscopy, confirm the molecular structure of the nano-sheets. Corrosion resistance, assessed through weight loss measurements and open circuit potential (OCP) tests, shows significant improvement with the addition of Ag/g-C₃N₄ and Ag-O₂/g-C₃N₄ nano-sheets at an optimized concentration of 15 mg. The protection efficiency is ranked as follows: O₂-g/C₃N₄ > O-g/C₃N₄ > Ag-O₂/g-C₃N₄ > Ag-g/C₃N₄ > g-C₃N₄. After 28 days of immersion in seawater, MS coated with O₂/g-C₃N₄ exhibited the least weight loss, with an inhibition efficiency of up to 99%. Electrochemical impedance spectroscopy (EIS) further demonstrated enhanced coating resistance for the O₂/g-C₃N₄ coating (Rct = 3.76 kΩ.cm², Rcoat = 1.69 kΩ.cm²) compared to pure PE (Rct = 0.005 kΩ.cm², Rcoat = 0.096 kΩ.cm²).

CONCLUSION

The synthesized O₂/g-C₃N₄ and Ag-O₂/g-C₃N₄ nano-sheets exhibit high surface areas and enhanced water dispersibility, which contribute to significant corrosion protection of MS. The electrochemical performance, including weight loss and OCP measurements, highlights the potential of these nano-sheet photo-catalysts in advancing corrosion resistance technologies, with broad implications for materials science and engineering applications. © 2024 Society of Chemical Industry (SCI).

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.

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