Abstract The electronic and diffusion-blocking properties of graphene nano-platelets (GNPs) are quantified with a view to understanding their action as (possible) additives to anti-corrosion coatings. Platelet size and thickness are determined by SEM and BET specific surface area measurements. A Scanning Kelvin probe is used to show that a contact potential of up to 1.2V develops between GNP particles and various metal substrates: silver, copper, iron and zinc. A novel photochemical method is used to show that oxygen permeation rates through a PVB-GNP (polyvinylbutyral) composite coating decrease by over an order of magnitude as GNP volume fraction increases to 0.056.

中文翻译：

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用于腐蚀控制的多层石墨烯纳米片复合涂层的评价第一部分 - 接触电位和气体渗透性

摘要 石墨烯纳米片 (GNP) 的电子和扩散阻挡特性被量化，以了解它们作为（可能的）防腐涂层添加剂的作用。血小板大小和厚度通过 SEM 和 BET 比表面积测量来确定。扫描开尔文探针用于显示 GNP 颗粒和各种金属基材（银、铜、铁和锌）之间产生高达 1.2V 的接触电位。一种新的光化学方法用于表明，随着 GNP 体积分数增加到 0.056，通过 PVB-GNP（聚乙烯醇缩丁醛）复合涂层的氧渗透率降低了一个数量级以上。