In this study, we investigated the synergistic effect of α-alumina-integrated silica nanocomposites as a promising material for corrosion protection. We synthesized these nanocomposites in different proportions (90 wt% silica:10 wt% alumina (AS-1) and 70 wt% silica:30 wt% alumina (AS-2)) via ball milling using rice husk and waste beverage cans as the precursor source. XRD, FTIR and EDX analysis of α-AlO integrated silica nanocomposites revealed distinct peaks corresponding to both silica and α-AlO components, confirming the successful formation of the nanocomposites. FESEM and TEM analyses showed that the α-alumina and silica nanoparticles were agglomerated and inhomogeneous, with sizes ranging from 150 nm to 250 nm. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization tests showed that pure silica, AS-1, and AS-2 had corrosion rates of 1.7648, 0.4396, and 0.0610 mm/yr, respectively. AS-1 and AS-2 exhibited higher charge transfer resistance (Rct) values of 34.54 KΩ and 48.60 KΩ, respectively, compared to pure silica (24.4 KΩ). Nyquist and Bode plots revealed the improved corrosion resistance of α-alumina-integrated silica nanocomposites compared to pristine silica-based protective coatings on mild steel. It is noted that the amount of α-alumina content enhances the corrosion resistance efficiency of the nanocomposites. The synergistic effect of the α-alumina-integrated silica nanocomposites can be attributed to the improved barrier properties and forming a protective layer on the metal substrate, effectively mitigating the corrosion process.

中文翻译：

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利用废饮料罐和稻壳制备α-氧化铝集成二氧化硅陶瓷纳米复合材料的协同效应用于防腐应用

在这项研究中，我们研究了α-氧化铝集成二氧化硅纳米复合材料作为一种有前途的腐蚀防护材料的协同效应。我们以稻壳和废饮料罐为原料，通过球磨法合成了不同比例的纳米复合材料（90 wt%二氧化硅：10 wt%氧化铝（AS-1）和70 wt%二氧化硅：30 wt%氧化铝（AS-2））。前驱源。 α-Al2O3 集成二氧化硅纳米复合材料的 XRD、FTIR 和 EDX 分析显示出与二氧化硅和 α-Al2O3 组分相对应的不同峰，证实了纳米复合材料的成功形成。 FESEM 和 TEM 分析表明，α-氧化铝和二氧化硅纳米粒子团聚且不均匀，尺寸范围为 150 nm 至 250 nm。电化学阻抗谱 (EIS) 和动电位极化测试表明纯二氧化硅、AS-1 和 AS-2 的腐蚀速率分别为 1.7648、0.4396 和 0.0610 mm/yr。与纯二氧化硅 (24.4 KΩ) 相比，AS-1 和 AS-2 表现出更高的电荷转移电阻 (Rct) 值，分别为 34.54 KΩ 和 48.60 KΩ。奈奎斯特图和伯德图显示，与低碳钢上的原始二氧化硅基保护涂层相比，α-氧化铝集成二氧化硅纳米复合材料的耐腐蚀性能有所提高。值得注意的是，α-氧化铝含量的量提高了纳米复合材料的耐腐蚀性能。 α-氧化铝集成二氧化硅纳米复合材料的协同效应可归因于改善的阻隔性能并在金属基材上形成保护层，有效减轻腐蚀过程。