Use of caffeine-containing MIL-100 (Fe) metal organic framework as a high-performance smart anticorrosion coating to protect stainless steel in 3.5 wt% NaCl solution

IF 2.3 4区材料科学 Q2 Chemistry Journal of Coatings Technology and Research Pub Date : 2023-01-03 DOI:10.1007/s11998-022-00709-8

Zahra Akhavan-Bahabadi, Hamid R. Zare, Zahra Mohammadpour

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Abstract

In this study, caffeine-loaded MIL-100 (Fe), caffeine@MIL-100 (Fe), was used as a smart corrosion-inhibiting coating to protect 308L-16 stainless steel (308L-16 SS). For this purpose, a thin film of the smart anticorrosion caffeine@MIL-100 (Fe) coating was deposited on an 308L-16 SS surface using a decanoic acid self-assembled monolayer. A significant encapsulation efficiency for caffeine loading in the MIL-100 (Fe) metal organic framework was obtained as 17.8%. The experimental data indicated that the caffeine@MIL-100 (Fe) coating would release the caffeine very rapidly as the solution became acidified around the corrosion sites and formed a protective layer to prevent from penetrating solution into the substrate. The EIS results and the Tafel plots showed that the proposed smart coating has an excellent performance to protect 308L-16 SS from corrosion in saline media. Based on the results, decreasing the solution pH would cause the MIL-100 (Fe) framework to decompose and subsequently release caffeine at the 308L-16 SS surface.

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采用含咖啡因的MIL-100 (Fe)金属有机骨架作为高性能智能防腐涂层，在3.5 wt% NaCl溶液中保护不锈钢

在本研究中，含咖啡因的MIL-100 (Fe)， caffeine@MIL-100 (Fe)被用作308L-16不锈钢(308L-16 SS)的智能缓蚀涂层。为此，使用癸酸自组装单层在308L-16 SS表面沉积了一层智能防腐caffeine@MIL-100 (Fe)涂层。在MIL-100 (Fe)金属有机骨架中，咖啡因负载的包封率为17.8%。实验数据表明，caffeine@MIL-100 (Fe)涂层会随着腐蚀部位周围溶液的酸化而迅速释放咖啡因，并形成保护层以防止溶液渗透到基体中。EIS结果和Tafel图表明，该智能涂层对308l - 16ss在盐水介质中的腐蚀具有良好的保护性能。结果表明，降低溶液pH会导致MIL-100 (Fe)框架在308L-16 SS表面分解并释放出咖啡因。

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来源期刊

Journal of Coatings Technology and Research CHEMISTRY, APPLIED-MATERIALS SCIENCE, COATINGS & FILMS

CiteScore

4.40

自引率

8.70%

发文量

期刊介绍： Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.