Polypyrrole Functionalized Graphene Oxide Accelerated Zinc Phosphate Coating under Low-Temperature

Qingsong Zhu, Jingguang Liu, Xin Wang, Yuxiang Huang, Yingtao Ren, Chenzhong Mu, Xianhu Liu, Feng Wei, Chuntai Liu
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引用次数: 37

Abstract

Zinc phosphate coating, as an effective and fast anticorrosion technique for the metals, have been developed rapidly in recent years. However, it is still a challenge to synthesize a low energy, environmentally friendly and efficient accelerator through a facile method. Herein, as a new accelerator, polypyrrole (PPy) functionalized graphene oxide (GO-PPy) nanocomposites were prepared by in-situ process to grow PPy film on GO surface, Incorporation of GO-PPy into phosphate baths accelerated the phosphating process of phosphate coating and promoted the nucleation and growth of phosphate crystals, achieving stronger corrosion resistance, which were confirmed by electrochemical measures and morphologies characteristic of the phosphate coating. Additionally, when the concentration of GO-PPy in the phosphate baths reached up 1.2 g/L, the phosphate coating possessed the most compact and uniform phosphate crystals and the best corrosion protection performance. Finally, the special mechanism of the phosphate process was discussed. This work introduces a new, low-energy, facile, environmentally friendly and alternative accelerator for the preparation of phosphate coatings.
聚吡咯功能化氧化石墨烯低温加速磷酸锌涂层研究
磷酸锌涂层作为一种高效、快速的金属防腐技术,近年来得到了迅速发展。然而,如何通过简单的方法合成低能量、环保、高效的加速器仍然是一个挑战。本文采用原位法制备了聚吡咯(PPy)功能化氧化石墨烯(GO-PPy)纳米复合材料作为新型促进剂,在氧化石墨烯表面生长PPy薄膜,将GO-PPy加入到磷酸盐液中,加速了磷酸盐涂层的磷化过程,促进了磷酸盐晶体的成核和生长,获得了更强的耐腐蚀性,这一点通过电化学测量和磷酸盐涂层的形貌特征得到了证实。另外,当磷酸液中GO-PPy的浓度达到1.2 g/L时,所制备的磷酸盐涂层具有最致密均匀的磷酸盐晶体和最佳的防腐性能。最后讨论了磷化过程的特殊机理。本文介绍了一种新型、低能耗、简便、环保、可替代的制备磷酸盐涂料的加速剂。
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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