Menéndez Suárez Mª Fe, Sanchez Pascal, Martínez Díez Ana L, Roman Beatriz Mingo, Mohedano Sánchez Marta
Surface Unit, Fundación Idonial, C/Calafates 11 Avilés, 33490 Asturias, Spain.
Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica, Universidad Complutense de Madrid, 28040 Madrid, Spain.
Materials (Basel). 2025 May 7;18(9):2159. doi: 10.3390/ma18092159.
In this work, silicon oxide based coatings with embedded graphene nanoplatelets (content ranging from 1.8 wt.% to 7.2 wt.%) have been developed following the sol-gel route, using AISI430 stainless steel as substrate and dip and roll-to-roll as coating techniques. The tribological and corrosion behaviour of these coatings have been evaluated and compared to bare steel. Concerning tribological behaviour, the coefficient of friction and wear print were significantly reduced with increasing the graphene nanoplatelets content. Regarding corrosion, all coatings showed improved corrosion behaviour compared to bare steel. However, higher concentration of nanoplatelets revealed a negative effect on the corrosion resistance, probably due to aggregation. Taking into account these two counteracting effects, as final part of this work, a bilayer coating with different graphene content has been proposed and fabricated. A top layer, with high graphene nanoplatelets concentration has allowed enhanced tribological properties whereas bottom layer, with no graphene nanoplatelets assures corrosion inhibition under harsh environments.
在这项工作中，采用溶胶-凝胶法，以AISI430不锈钢为基底，浸涂和卷对卷为镀膜技术，制备了嵌入石墨烯纳米片（含量范围为1.8 wt.%至7.2 wt.%）的氧化硅基涂层。对这些涂层的摩擦学和腐蚀行为进行了评估，并与裸钢进行了比较。关于摩擦学行为，随着石墨烯纳米片含量的增加，摩擦系数和磨损痕迹显著降低。关于腐蚀，与裸钢相比，所有涂层的腐蚀行为均有所改善。然而，较高浓度的纳米片对耐腐蚀性显示出负面影响，这可能是由于聚集所致。考虑到这两种相互抵消的影响，作为这项工作的最后一部分，提出并制备了一种具有不同石墨烯含量的双层涂层。具有高浓度石墨烯纳米片的顶层具有增强的摩擦学性能，而没有石墨烯纳米片的底层则确保在恶劣环境下具有缓蚀作用。
