Abstract The hydrothermally synthesized Ni(OH)2-YSZ composite reinforced with reduced graphene oxide (rGO), was applied for corrosion protection of 316L stainless steel (SS) by electrophoretic deposition. The effect of rGO introduction on corrosion properties of Ni(OH)2-YSZ coating was investigated. The morphology and structures were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). The corrosion properties of specimens were determined by Tafel polarization and electrochemical impedance spectroscopy (EIS) analysis in 3.5 wt% NaCl corrosive solution. The results showed that the corrosion protection properties were remarkably improved by the introduction of rGO into Ni(OH)2-YSZ composite film. The Ni(OH)2-YSZ/rGO coated SS showed a higher charge transfer resistance (1.85 × 105 Ω cm2) compared to Ni(OH)2-YSZ coated SS (6.12 × 104 Ω cm2) and bare 316L SS (4.55 × 104 Ω cm2). The addition of rGO to Ni(OH)2-YSZ composites efficaciously improved the dispersion of nanoparticles and also reduced their size. Consequently, the electrochemical enhancement caused by rGO introduction was attributed to the nano-sized particles, compaction, and uniformity of the coating, which efficiently prevented the steel substrate from corrosion attack.

中文翻译：

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水热合成的 Ni(OH)2-YSZ/还原氧化石墨烯 (rGO) 纳米复合涂层的增强保护性能

摘要 水热合成的还原氧化石墨烯 (rGO) 增强的 Ni(OH)2-YSZ 复合材料通过电泳沉积应用于 316L 不锈钢 (SS) 的腐蚀保护。研究了 rGO 的引入对 Ni(OH)2-YSZ 涂层腐蚀性能的影响。通过X射线衍射（XRD）和场发射扫描电子显微镜（FESEM）对形貌和结构进行表征。通过塔菲尔极化和电化学阻抗谱 (EIS) 分析在 3.5 wt% NaCl 腐蚀性溶液中测定样品的腐蚀性能。结果表明，在Ni(OH)2-YSZ复合薄膜中引入rGO显着提高了防腐性能。Ni(OH)2-YSZ/rGO 涂层的 SS 显示出更高的电荷转移电阻 (1. 85 × 105 Ω cm2) 与 Ni(OH)2-YSZ 涂层 SS (6.12 × 104 Ω cm2) 和裸 316L SS (4.55 × 104 Ω cm2) 相比。将 rGO 添加到 Ni(OH)2-YSZ 复合材料中有效地改善了纳米颗粒的分散并减小了它们的尺寸。因此，由 rGO 引入引起的电化学增强归因于涂层的纳米级颗粒、压实和均匀性，这有效地防止了钢基材的腐蚀攻击。