The present work is devoted to study the effect of the Graphene Oxide (GO) addition in the corrosion protection capacity of a commercial Rust Converter (RC). These substances are designed to be applied over corroded surfaces. It is supposed that they react with rust generating a stable layer, which protects to the metallic substrate. The RC used here is a commercial product that contains gallic acid as reactive compound, which reduces the GO added to reduced-GO (r-GO).

Electrochemical Impedance Spectroscopy (EIS) was used to characterize the barrier properties of RC and RC + r-GO treatments, both as in free-standing films and in supported coatings on rusted steel. The results suggest that the RC + r-GO treatment generates more stable and protective films. For the interpretation of the impedance diagrams, the semiconducting character of the film obtained from the RC + r-GO treatment was considered. The initial lower impedance values observed in these samples are related to the presence of electronic paths in parallel with the ionic paths. The impedance values remain stable during long-term immersion. On the contrary, samples coated with the RC treatment undergo a continuous impedance decrease indicating a loss of the barrier properties of the coating.

本工作致力于研究氧化石墨烯（GO）的添加对商用Rust Converter（RC）的腐蚀防护能力的影响。这些物质设计用于在腐蚀的表面上使用。据推测，它们与铁锈反应生成了一层稳定的金属层，从而保护了金属基材。此处使用的RC是一种商用产品，其中含有没食子酸作为反应性化合物，可减少添加到还原GO（r-GO）中的GO。

电化学阻抗谱（EIS）用于表征RC和RC + r-GO处理的阻隔性能，无论是在独立式膜中还是在生锈的钢上的支撑涂层中。结果表明，RC + r-GO处理可产生更稳定的保护膜。为了解释阻抗图，考虑了通过RC + r-GO处理获得的薄膜的半导体特性。在这些样品中观察到的初始较低的阻抗值与平行于离子路径的电子路径的存在有关。在长期浸没期间，阻抗值保持稳定。相反，用RC处理涂覆的样品经历连续的阻抗降低，这表明涂层的阻挡性能的损失。