We report a corrosion study on Al 7075—T651 surface. The purpose of the study is to use Graphene oxide—Polymethyl methacrylate (GO—PMMA) coating as corrosion resistant layer on Al 7075—T651, an alloy of aluminium mainly used in aerospace industries. The study is done with and without GO—PMMA coating on Al 7075—T651 respectively, by varying the exposure time of material (24, 48 and 72 h) with HCl in atmospheric condition. The formation of corrosion is resisted by the GO—PMMA coated samples. The effect is studied by material characterization and non-destructive evaluation (NDE) techniques. The formation of aluminium hydroxide in uncoated samples is confirmed by Raman spectroscopy and x-ray diffraction (XRD). Corrosion formation, GO—PMMA coating on plain and coated samples are clearly visible in Scanning Electron Microscope (SEM) study. Shift in current is observed in I–V Characteristics study, due to pitting in plain samples. Material loss is observed, to be low in GO—PMMA coated samples, using pulsed thermography. The work proves that the GO—PMMA coating is very effective in corrosion resistance.

我们报告了对 Al 7075-T651 表面的腐蚀研究。该研究的目的是使用氧化石墨烯-聚甲基丙烯酸甲酯 (GO-PMMA) 涂层作为 Al 7075-T651 的耐腐蚀层，Al 7075-T651 是一种主要用于航空航天工业的铝合金。通过改变材料在大气条件下与 HCl 的暴露时间（24、48 和 72 小时），分别在 Al 7075-T651 上使用和不使用 GO-PMMA 涂层进行研究。GO-PMMA 涂层样品可以抵抗腐蚀的形成。通过材料表征和非破坏性评估 (NDE) 技术研究这种影响。通过拉曼光谱和 X 射线衍射 (XRD) 证实了未涂层样品中氢氧化铝的形成。在扫描电子显微镜 (SEM) 研究中，腐蚀形成、GO-PMMA 涂层在普通和涂层样品上清晰可见。由于普通样品中的点蚀，在 I-V 特性研究中观察到电流偏移。使用脉冲热成像观察到材料损失，在 GO-PMMA 涂层样品中较低。工作证明GO-PMMA涂层在耐腐蚀性方面非常有效。