Given that graphene features high electrical conductivity, it is a kind of material with corrosion-promotion activity. This study aimed to inhibit the corrosion-promotion activity of graphene in coatings. Here, we report an exciting application of epoxy matrix (EP)/F-doped reduced graphene oxide (rGO) coatings for the long-term corrosion protection of steel. The synthesized F-doped rGO (FG) did not reduce the utilization of rGO by a wide margin and possessed distinctive electrically insulating nature. The electrical conductivity of rGO was approximately 1500 S/m, whereas those of FG-1, FG-2 and FG-3 were 1.17, 5.217 × 10⁻² and 3.643 × 10^-11 S/m, respectively. FG and rGO were then dispersed into epoxy coatings. The chemical structures of rGO and FG were investigated by transmission electron microscopy (TEM), scanning probe microscopy (SPM), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). EP/FG coatings exhibited outstanding corrosion protection in comparison with blank EP and EP/rGO coatings mainly because the corrosion-promotion effect of rGO was eliminated. The anticorrosion ability of EP/FG coatings was improved with increased F-doped degree of FG. In addition, electrochemical impendance spectroscopy (EIS) results indicated that the R_c values of EP/FG-2 and EP/FG-3 were four orders of magnitude higher than those of EP/rGO in diluent NaCl solution (3.5 wt.%) after immersion for 90 days.

考虑到石墨烯具有高电导率，它是一种具有腐蚀促进活性的材料。这项研究旨在抑制石墨烯在涂层中的腐蚀促进活性。在这里，我们报告了环氧基质（EP）/ F掺杂的还原氧化石墨烯（rGO）涂层在钢的长期腐蚀防护中的令人兴奋的应用。合成的F掺杂rGO（FG）并未大幅降低rGO的利用率，而是具有独特的电绝缘特性。rGO的电导率约为1500 S / m，而FG-1，FG-2和FG-3的电导率分别为1.17、5.217×10 ^-2和3.643×10 ^-11S / m。然后将FG和rGO分散到环氧涂料中。rGO和FG的化学结构通过透射电子显微镜（TEM），扫描探针显微镜（SPM），X射线光电子能谱（XPS），傅里叶变换红外光谱（FT-IR）和X射线衍射（ XRD）。与空白EP和EP / rGO涂层相比，EP / FG涂层具有出色的防腐性能，主要是因为消除了rGO的腐蚀促进作用。EP / FG涂层的抗腐蚀能力随着F掺杂FG程度的提高而提高。此外，电化学阻抗谱（EIS）结果表明，R _c 浸泡90天后，在稀释的NaCl溶液（3.5重量％）中，EP / FG-2和EP / FG-3的值比EP / rGO高四个数量级。