Eco-friendly silane as corrosion inhibitor for dual self-healing anticorrosion coatings

IF 2.3 4区材料科学 Q2 Chemistry

Journal of Coatings Technology and Research Pub Date : 2022-05-31 DOI:10.1007/s11998-021-00608-4

Jialiang Liu, Dashuai Yan, Zhenhua Zhang, Yanli Wang, Dalei Song, Tao Zhang, Jingyuan Liu, Fei He, Meng Zhang, Jun Wang

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引用次数: 4

Abstract

Corrosion resistance and active protection performance of organic coatings can be improved by incorporation of corrosion inhibitor-loaded nanocontainers. Herein, 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (FTES) as a green corrosion inhibitor was encapsulated in hollow mesoporous silica (HMS). FTES-loaded HMS (FHMS) was embedded in an epoxy coating on the surface of the magnesium (Mg) alloy. Artificial defect in FHMS-loaded epoxy coating was made by needle punching. The long-term anticorrosion behavior and self-healing properties of the modified coating were evaluated by electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). In all cases, FHMS can enhance corrosion resistance of the epoxy coating. Among all the FHMS-loaded coatings, the coating containing 0.5 wt% FHMS (FHMS-0.5%) still exhibits excellent corrosion protection performance after 2688 h of immersion. Meanwhile, it shows superior self-healing ability in the scratched areas. These are attributed to the fact that FTES released from HMS nanoparticles can interact with the epoxy coating and the Mg alloy substrate. Moreover, FTES silane can also form a crosslinked Si-O-Si network by itself.

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生态友好型硅烷缓蚀剂用于双自愈防腐涂料

纳米缓蚀剂的掺入可以提高有机涂层的抗腐蚀性能和主动防护性能。本文将1H, 1H, 2H, 2H-全氟辛基三乙氧基硅烷(FTES)作为绿色缓蚀剂包封在中空介孔二氧化硅(HMS)中。fes负载的HMS (FHMS)包埋在镁(Mg)合金表面的环氧涂层中。采用针冲法制备了fhms负载环氧涂层的人工缺陷。采用电化学阻抗谱(EIS)、扫描电子显微镜(SEM)和能谱(EDS)对改性涂层的长期防腐性能和自愈性能进行了评价。在任何情况下，FHMS都可以增强环氧涂层的耐腐蚀性。在所有负载FHMS的涂层中，含有0.5 wt% FHMS的涂层(FHMS-0.5%)在浸泡2688 h后仍具有优异的防腐性能。同时，在划伤部位表现出优异的自愈能力。这是由于HMS纳米颗粒释放的FTES可以与环氧涂层和镁合金基体相互作用。此外，FTES硅烷本身也可以形成交联的Si-O-Si网络。

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

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.