Graphene-based materials have demonstrated high chemical stability and are very promising for protection against the corrosion of metal surfaces. For this reason, in this work, protective layers composed of graphene oxide, reduced graphene oxide and their mixtures were investigated, respectively, against the corrosion of the surface of lead induced by water drops. The materials were deposited on a Pb surface from their suspensions using a Meyer rod. The surface chemical composition, morphology and structure of the coatings were studied by X-ray photoemission spectroscopy (XPS), scanning electron microscopy (SEM), atomic force microscopy (AFM) and stylus profilometry. Moreover, a specific methodology based on the evolution of the water contact angle with time was used to evaluate the reactivity of the lead surface. The results show that the graphene-based materials can form an efficient barrier layer against the degradation of the Pb surface and that the degradation process induced by water is reduced by more than 70%. Moreover, unexpectedly, the best protective performance was obtained using graphene oxide as the coating.

中文翻译：

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氧化石墨烯/还原氧化石墨烯薄膜作为铅的保护屏障，可防止水滴引起的不同曝气腐蚀

基于石墨烯的材料已表现出高化学稳定性，并且非常有希望用于防止金属表面的腐蚀。为此，在这项工作中，分别研究了由氧化石墨烯、还原氧化石墨烯及其混合物组成的保护层，以防止水滴引起的铅表面腐蚀。使用 Meyer 棒将材料从它们的悬浮液中沉积在 Pb 表面上。采用X射线光电子能谱（XPS）、扫描电子显微镜（SEM）、原子力显微镜（AFM）和触针轮廓仪对涂层的表面化学成分、形貌和结构进行了研究。此外，使用基于水接触角随时间演变的特定方法来评估铅表面的反应性。结果表明，基于石墨烯的材料可以形成有效的阻挡层来抵抗铅表面的降解，并且水引起的降解过程减少了70%以上。此外，出乎意料的是，使用氧化石墨烯作为涂层获得了最佳保护性能。