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Research on the Modification of Silane/Zeolite Composite Anticorrosive Membrane on Ti-6Al-4V Alloy Surface by Graphene Oxide and Its Mechanism
Journal of Materials Engineering and Performance ( IF 2.3 ) Pub Date : 2020-09-08 , DOI: 10.1007/s11665-020-05089-x
Juan Du , Liu Qingmao , Xiangyun Li , Ziming Wei , Song Haipeng

The zeolite membrane as a corrosion-resistant membrane has green environmental protection, high-temperature resistance, high-mechanical strength, and other characteristics, which has attracted much attention. However, due to the very different surface properties between metals and inorganics, the embodiment of high-binding force membrane is a major difficulty in the current zeolite membrane synthesis technology. Research has been conducted on the silane (YDH-151)/zeolite (TS-1) composite anticorrosive membrane in Ti-6Al-4V alloy surface, and on the modification effect by using graphene oxide (GO), as well as the membrane formation mechanism after being modified. Scanning electron microscope and 3D laser confocal microscope (3D LCSM) were used to study the effect of GO on the modified silane/zeolite composite anticorrosion membrane, and electrochemical methods, contact angle, bonding force, Fourier transform infrared ray were used to study the modification effect and the membrane formation mechanism and process after being modified. Microscopic observations show that GO causes the zeolite particles to accelerate to accumulate, hinders the lateral membrane formation of TS-1 zeolite which forms thus non-negligible pores or defects. It also reduces the density of the zeolite membrane, and the hydrophobicity and binding force of the composite membrane. However, GO can effectively decrease the corrosion current density and greatly enhance the corrosion resistance of the membrane. YDH-151 undergoes dehydration condensation reaction with metal surface and zeolite, and graft reaction with GO, forming a dense YDH-151/GO/TS-1 composite membrane on the surface of Ti-6Al-4V alloy, with a corrosion resistance rate of 99.8%.



中文翻译:

石墨烯对Ti-6Al-4V合金表面硅烷/沸石复合防腐膜的改性及其机理研究

沸石膜作为耐腐蚀膜具有绿色环保,耐高温,高机械强度等特点,引起了人们的广泛关注。然而,由于金属和无机物之间非常不同的表面性质,高结合力膜的实施方式是当前沸石膜合成技术中的主要困难。研究了Ti-6Al-4V合金表面的硅烷(YDH-151)/沸石(TS-1)复合防腐蚀膜,使用氧化石墨烯(GO)的改性效果以及膜的形成修改后的机制。使用扫描电子显微镜和3D激光共聚焦显微镜(3D LCSM)研究了GO对改性硅烷/沸石复合防腐膜的影响,并通过电化学方法,接触角,结合力,傅立叶变换红外光谱等方法研究了改性效果以及改性后的膜形成机理和过程。显微镜观察表明,GO引起沸石颗粒加速聚集,阻碍了TS-1沸石的侧向膜形成,从而形成了不可忽略的孔或缺陷。它还降低了沸石膜的密度,以及复合膜的疏水性和结合力。然而,GO可以有效地降低腐蚀电流密度并大大提高膜的耐腐蚀性。YDH-151与金属表面和沸石发生脱水缩合反应,与GO接枝反应,在Ti-6Al-4V合金表面形成致密的YDH-151 / GO / TS-1复合膜,

更新日期:2020-09-08
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