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首页> 外文期刊>Applied Surface Science >Enhancement of the active/passive anti-corrosion properties of epoxy coating via inclusion of histamine/zinc modified/reduced graphene oxide nanosheets
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Enhancement of the active/passive anti-corrosion properties of epoxy coating via inclusion of histamine/zinc modified/reduced graphene oxide nanosheets

机译：通过加入组胺/锌改性/还原的氧化石墨烯纳米片增强环氧树脂涂层的主动/被动防腐性能

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摘要

This research introduces a greenovel route for preparation of an epoxy system with bi-functional active/passive anti-corrosion properties via inclusion of modified/reduced graphene nanoparticles. For the first time, the reduced nanosheet (RGO) with the barrier-inhibitive activities was prepared using bioactive reductant based on histamine. Also, zinc cations were loaded onto RGO sheets by two sequence based (RGO-Hist-Zn-I nanosheet) and in-situ based (RGO-Hist-Zn-II nanosheet) approaches. Characterization of the synthesized RGOs using X-ray photoelectron spectroscopy, field emission-scanning electron microscopy, transmittance electron microscopy, ultraviolet-visible and inductively coupled plasma techniques approved the precision of graphene oxide reduction via histamine and zinc cation's chemical adsorption. The performance of the RGO nanosheets was investigated by electrochemical impedance spectroscopy, potentiodynamic polarization, salt spray, pull off adhesion, cathodic disbondment (CD) and energy dispersive X-ray spectroscopy analyses. The results clarified that the epoxy coating reinforced with RGO-Hist-Zn-I provided the best anti-corrosion performance (log vertical bar Z vertical bar(10) mHz=9.73 Omega cm(2) after 60 days immersion in NaCl solution), self-healing property (liberation of histamine and zinc cations from the nanocomposite bulk to the scratch region after 8 h immersion), adhesion to steel surface (lowest adhesion loss, i.e. 14.2% after 38 days of immersion and CD resistance (ca. 4.7 mm).
机译：这项研究引入了一种绿色/新颖的途径，通过包含改性/还原的石墨烯纳米颗粒，可以制备具有双功能主动/被动防腐性能的环氧体系。首次使用基于组胺的生物活性还原剂制备了具有屏障抑制活性的还原纳米片（RGO）。同样，通过两种基于序列的（RGO-Hist-Zn-I纳米片）和基于原位的（RGO-Hist-Zn-II纳米片）方法将锌阳离子加载到RGO片上。使用X射线光电子能谱，场发射扫描电子显微镜，透射电子显微镜，紫外可见和感应耦合等离子体技术对合成的RGO进行表征，证明了通过组胺和锌阳离子的化学吸附还原氧化石墨烯的精度。 RGO纳米片的性能通过电化学阻抗谱，电位动力学极化，盐雾，剥离粘附力，阴极剥离（CD）和能量色散X射线光谱分析进行了研究。结果表明，用RGO-Hist-Zn-I增强的环氧涂层具有最佳的防腐性能（在NaCl溶液中浸泡60天后，log垂直线Z垂直线（10）mHz = 9.73 Omega cm（2）），自修复性能（浸泡8 h后，组胺和锌阳离子从纳米复合材料本体释放到划痕区），对钢表面的附着力（最低的附着力损失，即浸泡38天后的14.2％和CD耐性（约4.7 mm） ）。

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